Command transmission based on electrical measurements in event system

Abstract

Devices, systems, and methods for command transmission based on electrical measurements in an event system. In some examples, one or more embodiments include a controller comprising a memory and a processor to execute instructions stored in the memory to: determine electrical measurements in an event device loop, the event device loop comprising a plurality of event devices connected to an event device panel; comparing the electrical measurement with a threshold value; and determining a plurality of commands to be transmitted to event devices in the event device loop based on a comparison of the electrical measurements to the threshold.

Description

Technical Field

[0001] The present disclosure relates to devices, systems, and methods for command transmission based on electrical measurements in an event system. Background Art

[0002] Facilities, such as commercial facilities, office buildings, hospitals, campuses (e.g., including buildings and outdoor spaces), etc., may have an event system that can be triggered during an event (such as an emergency, e.g., a fire) to warn occupants to evacuate. Such an event system may include an alarm system having a control panel and many event devices (e.g., sensors, sounders, pull-type fire alarm boxes, etc.) located throughout the facility (e.g., on different floors and / or in different rooms of the facility) that can perform actions when an event (e.g., a hazardous event, a fault event, etc.) occurs in the facility. In the example of an event, many of the event devices can provide notification of the event to occupants of the facility via alarms and / or other mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0003] Figure 1 is an example of a system for command transmission based on electrical measurements in an event system according to one or more embodiments of the present disclosure.

[0004] Figure 2 is an example of a method for command transmission based on electrical measurements in an event system according to one or more embodiments of the present disclosure.

[0005] Figure 3 is an example of a controller for command transmission based on electrical measurements in an event system according to one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0006] Devices, systems, and methods for transmitting commands based on electrical measurements in an event system. In some examples, one or more embodiments include a controller including a memory and a processor to execute instructions stored in the memory to: determine electrical measurements in an event device loop, the event device loop including a plurality of event devices connected to an event device panel; compare the electrical measurements to a threshold; and determine a plurality of commands to be transmitted to the event devices in the event device loop based on the comparison of the electrical measurements to the threshold.

[0007] Facilities can use event systems to warn residents of facilities of emergency events, such as fires. An event system can be a system of equipment that operates to collect information about a facility and provides the collected information for analysis. Such an event system can also take actions based on the collected information, such as providing auditory and / or visual warnings in emergency events. For example, an event system can use event devices to warn residents of emergency events, such as fires, that occur in a space. As used herein, the term "event device" refers to a device that can receive inputs related to an event and / or generate outputs related to an event. Such event devices can be part of an event system for a space within / throughout a facility, and can include devices such as fire sensors, smoke detectors, heat detectors, carbon monoxide (CO) detectors, or combinations of these devices; air quality sensors; interfaces; manual call points (MCPs); pull-type fire alarm boxes; input / output modules; aspirated devices; and / or auditory / visual devices (e.g., speakers, sounders, flashers, buzzers, microphones, cameras, video displays, video screens, etc.), relay output modules, and other types of event devices. Such event devices can also include self-test capabilities.

[0008] The control panel can be connected to multiple event devices and can provide power to multiple event devices. For example, multiple event devices can be connected in an event device loop and connected to the control panel. The control panel can apply voltage to the event device loop to power the event devices on the event device loop. This power supply can allow the event device to perform actions such as communication between the event device and the control panel, self-test procedures, and / or provide audible and / or visual warnings in emergency events, as well as other actions.

[0009] During operation, the voltage applied by the control panel on the event device loop may drop with the loop resistance and current demand from the event device on the event device loop. The loop resistance may vary with conductor resistance and series components such as isolators.

[0010] The current on the event device loop may be estimated by determining a standby current and an alarm current. The standby current may be the amount of current that powers the event device on the event device loop in a non-alarm state, and the alarm current may be the amount of current that powers the event device on the event device loop in an alarm state, and the amount of the alarm current may be higher than the standby current. In previous methods, the estimation of the standby current and the alarm current is usually performed when designing, installing, and / or commissioning a panel.

[0011] However, this approach does not take into account transient conditions on the event device loop. For example, when a command is transmitted from the control panel to the event device on the event device loop, such command transmission causes amplitude modulation of the signal on the event device loop, resulting in lower voltage and higher current. This lower voltage causes the event device to not be powered properly, and when the voltage returns to normal levels, a current demand on the event device loop that is higher than the normal standby current can be observed.

[0012] In addition, when the event device is in an alarm state, both the current and the resistance can be high, resulting in a large voltage drop. In this case, if the control panel attempts to transmit a command to the event device, such a command may not reach the intended event device.

[0013] In previous methods, reducing this voltage drop at the control panel includes providing a higher voltage at the control panel to power the event device loop. However, the event devices may include the maximum voltage they can withstand at the beginning of the event device loop, when the voltage drop is the lowest. In addition, previous methods include reducing the resistance or load on the event device loop. However, reducing the resistance or load may result in reduced function of the event device.

[0014] The transmission of commands based on electrical measurements in an event system according to the present disclosure can allow for dynamic monitoring of electrical measurements on an event device loop. Such dynamic monitoring can allow for prioritization of commands to be transmitted on an event device loop based on electrical measurements. In this way, commands can be transmitted at specific times to ensure that such commands reach the intended event device based on the electrical conditions on the event device loop. In addition, the transmission of commands at specific times can take into account changes in the event device loop. Therefore, compared to previous methods, this method can allow lower power and / or traditional control panels to drive higher event device loop loads, allow control panels to be designed with lower voltages to allow for more lower voltage event devices, allow for higher power event devices on event device loops, longer event device loops, and / or smaller segment wiring on event device loops.

[0015] In the following Detailed Description, reference is made to the accompanying drawings which form part of the present Detailed Description. The drawings show, by way of illustration, the manner in which one or more embodiments of the present disclosure may be practiced.

[0016] These embodiments are described in sufficient detail to enable one of ordinary skill in the art to practice one or more embodiments of the present disclosure. It is to be understood that other embodiments may be utilized and process, electrical and / or structural changes may be made without departing from the scope of the present disclosure.

[0017] It should be understood that the elements shown in the various embodiments herein may be added, exchanged, combined and / or eliminated to provide multiple additional embodiments of the present disclosure. The proportions and relative sizes of the elements provided in the drawings are intended to illustrate embodiments of the present disclosure and should not be limiting.

[0018] The drawings herein follow the following numbering convention: one or more first digits correspond to the drawing number, and the remaining digits identify the element or component in the drawing. Similar elements or components between different drawings may be identified by using similar numerals. For example, 102 may be in Figure 1 The component is referenced as "04" in the Figure 3 Cited as 304.

[0019] As used herein, "a" or "several" things may refer to one or more such things, and "plurality" things may refer to more than one such things. For example, "several components" may refer to one or more components, and "plurality components" may refer to more than one component.

[0020] Figure 1 1 is an example of a system 100 for command transmission based on electrical measurements in an event system according to one or more embodiments of the present disclosure. The system 100 may include an event device panel 102 and event devices 106-1, 106-2, 106-3, 106-4, 106-N. The event device panel 102 may include a controller 104.

[0021] As described above, the system 100 may be included in a facility, a space in a facility, etc. The system 100 may include a device / series of devices to detect events and / or process and / or analyze detected events to determine whether to generate an alarm for occupants of the facility.

[0022] For example, the system 100 may include event devices 106-1, 106-2, 106-3, 106-4, 106-N (collectively referred to as event devices 106). Event device 106 may be a device that detects events and transmits the detected events for processing and / or analysis. As described above, event device 106 may include, for example, a camera, a motion sensor, a fire sensor, a smoke detector, a heat detector, a carbon monoxide (CO) detector, a fixed gas and / or flame detector, an aspirating smoke detector, a beam smoke detector, or a combination of these devices; an air quality sensor; an interface; a manual call point (MCP); a pull alarm box; an input / output module; an aspirating device; a sprinkler control; and / or an audio / visual device (e.g., a speaker, a microphone, a camera, a video display, a video screen, etc.), a relay output module, and other types of event devices. In addition, event device 106 may also include self-test capabilities.

[0023] The system 100 may also include an event device panel 102. The event device panel 102 may be used to control various event devices 106 included in the system 100.

[0024] like Figure 1 As shown, the event device panel 102 can be connected to the event device 106 in the event device loop 105. The event device loop 105 can be a closed electrical path through different nodes. For example, the event device loop 105 can be composed of a closed loop between event devices 106-1, 106-2, 106-3, 106-4, 106-N and the final event device panel 102.

[0025] Thus, as described above, the event device panel 102 may connect to the event device 106 via the event device loop 105, provide power to the event device 106, and / or transmit a plurality of commands to the event device 106. For example, the event device panel 102 may apply voltage to the event device loop 105 to power the event device 106 on the event device loop 105. Such powering may allow the event device 106 to perform actions such as communication between the event device 106 and the event device panel 102, self-test procedures, and / or providing audible and / or visual warnings in an emergency event, among other actions.

[0026] As further described below, the controller 104 may compare the electrical measurements to a threshold value to determine whether to transmit a command / commands to the event device 106 on the event device loop 105. To determine the threshold value, the controller 104 may calculate a maximum current value on the event device loop 105. The maximum current value on the event device loop 105 may correspond to a current value when all event devices 106 are activated at the same time. Thus, the controller 104 may calculate the maximum current value based on all event devices 106 (e.g., the type of event devices 106, how much current they consume, etc.) being activated at the same time.

[0027] Once the controller 104 calculates the maximum current value, the controller 104 can specify the maximum current value as the threshold value. For example, the controller 104 can calculate that the maximum current value when all event devices 106 are activated at the same time is 400 milliamperes (mA). Therefore, the controller 104 can specify the maximum current value of 400mA as the threshold value. This determination can be initially performed during the installation and / or commissioning of the system 100. However, the embodiments of the present disclosure are not limited to determining the threshold value during the installation and / or commissioning of the system 100. For example, if a change in the event device loop 105 is detected, the controller 104 can determine a revised threshold value, as further described herein.

[0028] As described above, event device panel 102 may transmit a plurality of commands to event device 106. Such commands may include priority commands and non-priority commands. As used herein, the term "priority command" refers to a transmission used to determine whether event device 106 is in an alarm state. As used herein, the term "alarm state" refers to a state in which an event device has detected an event. For example, event device 106-1 may be a smoke detector, and in response to event device 106-1 detecting smoke, event device 106-1 may enter an alarm state, indicating that a detector included in event device 106-1 has detected smoke.

[0029] Commands may also include non-priority commands. As used herein, the term "non-priority command" refers to a transmission used to determine peripheral information about the event device 106. For example, the peripheral information may include any information that is not related to whether the event device 106 is in an alarm state. Such information may include whether the event device 106 is still connected to the event device loop 105 (e.g., presence detection), the manufacturing date of the event device 106, the type identifier of the event device 106, the status of the event device 106 (e.g., whether the event device is operating normally or there is a fault), the status of a detector included in the event device 106 (e.g., whether the detector is clean or dirty), etc.

[0030] As described above, the commands to be transmitted may include priority commands and non-priority commands. Such priority commands and non-priority commands may constitute a plurality of commands that the controller 104 may determine whether to transmit, as further described herein.

[0031] As described above, transmitting such commands to the event device 106 on the event device loop 105 may cause amplitude modulation on the event device loop 105. Such amplitude modulation may result in lower voltage and higher current, wherein the lower voltage may result in the event device 106 not being properly powered, and when the voltage returns to normal, the current demand on the event device loop 105 may result in a higher current than the normal standby current of the event device loop 105. Thus, the controller 104 may determine whether to transmit and / or delay certain commands to the event device 106 on the event device loop 105 based on electrical measurements, as further described herein.

[0032] For example, the controller 104 may determine an electrical measurement in an event device loop 105 that includes an event device 106 connected to the event device panel 102. In some examples, the electrical measurement may be a current value on the event device loop 105. For example, in a first example, the controller 104 may determine that the electrical measurement on the event device loop 105 is 200 mA. In a second example, the controller 104 may determine that the electrical measurement on the event device loop 105 is 430 mA.

[0033] Once the electrical measurement result is determined, the controller 104 can compare the electrical measurement result to a threshold value. For example, the controller 104 can compare the electrical measurement result to a threshold value (e.g., 400 mA). The controller 104 can then determine a command of a particular command type (e.g., a priority command and / or a non-priority command) among a plurality of commands for the event device 106 in the event device loop 105 based on the comparison of the electrical measurement result to the threshold value, as further described herein.

[0034] In a first example, the controller 104 may determine that the electrical measurement result is 200 mA, and compare the electrical measurement result 200 mA to a threshold value (e.g., 400 mA). In response to the electrical measurement result being less than the threshold value, the controller 104 may determine that the command type includes a predetermined command and a non-predetermined command. For example, at the point in time when the controller 104 determines that the electrical measurement result is 200 mA, the event device 106 on the event device loop 105 does not experience a voltage drop and / or current demand.

[0035] Thus, while priority commands (e.g., commands for determining whether the event device 106 is in an alarm state or a non-alarm state) can still be transmitted to the event device 106, non-priority commands can also be transmitted without the possibility that the priority command transmission is interrupted and fails to reach the event device 106. That is, the controller 104 can transmit commands to the event device 106 in response to the electrical measurement result being less than a threshold, wherein the command can be a priority command and / or a non-priority command. For example, the controller 104 can transmit a priority command to the event device 106 to determine whether any of the event devices 106 is in an alarm state, and can also transmit a non-priority command to determine whether the event device 106 is operating normally or has a fault, the manufacturing date of the event device 106, etc.

[0036] In a second example, the controller 104 may determine that the electrical measurement is 430 mA and compare the electrical measurement 430 mA to a threshold value (e.g., 400 mA). In response to the electrical measurement being greater than the threshold value, the controller 104 may determine that the command type includes only predetermined commands. For example, at the point in time when the controller 104 determines that the electrical measurement is 430 mA, the event device 106 on the event device loop 105 is experiencing a voltage drop and / or current demand.

[0037] Therefore, non-priority commands are not transmitted temporarily. Instead, only priority commands (e.g., commands for determining whether event device 106 is in an alarm state or a non-alarm state) may be transmitted to event device 106. That is, controller 104 may transmit a command to event device 106 in response to an electrical measurement result being greater than a threshold, wherein the command may be only a priority command. For example, controller 104 may transmit a priority command to event device 106 to determine whether any of event devices 106 is in an alarm state, while blocking / delaying the transmission of any non-priority commands. By transmitting only priority commands (and not non-priority commands), controller 104 may ensure that priority commands (e.g., commands for determining whether event device 106 is in an alarm state or a non-alarm state) will reach event device 106. Such a method can transmit priority commands to the event device 106 over non-priority commands under certain event device loop 105 conditions, thereby ensuring that the event device panel 102 can determine whether the event device 106 is detecting an event in the facility under any event device loop 105 conditions without increasing the voltage at the event device panel 102 or reducing the resistance or load on the event device loop 105.

[0038] As described above, conditions on the event device loop 105 may be transient and dynamic. For example, while the electrical measurement may exceed a threshold at a first time, the electrical measurement may decrease as conditions on the event device loop 105 change such that the electrical measurement will not exceed the threshold at a second time.

[0039] Thus, in response to the electrical measurement being greater than the threshold, the controller 104 may schedule subsequent electrical measurements. For example, the controller 104 may schedule subsequent electrical measurements (e.g., 2 minutes after the controller 104 determines that the electrical measurement is greater than the threshold). In addition, similar to the above process, the controller 104 may determine subsequent electrical measurements at a predetermined time, and compare the subsequent electrical measurements to the threshold in response to determining the subsequent electrical measurements. In response to the subsequent electrical measurement being less than the threshold, the controller 104 may transmit a command to the event device 106, wherein the command may be a priority command and / or a non-priority command. Thus, scheduling subsequent electrical measurements ensures that non-priority commands are not transmitted within a predetermined time period (e.g., 2 minutes) as long as the subsequent electrical measurement is less than the threshold.

[0040] Although the controller 104 is described above as scheduling subsequent electrical measurements 2 minutes after the controller 104 determines that the electrical measurement is greater than the threshold, embodiments of the present disclosure are not limited thereto. For example, the controller 104 may schedule subsequent electrical measurements less than 2 minutes or more than 2 minutes after the controller 104 determines that the electrical measurement is greater than the threshold, thereby allowing non-priority commands not to be transmitted during different predetermined time periods.

[0041] Although the threshold value may be determined as the maximum current value on the event device loop 105, in some cases, the event device loop 105 may change. For example, after the event device loop 105 is installed / commissioned in a facility, the event device loop 105 may change. For example, if an event device 106 is added to the event device loop 105 (e.g., a building manager adds an additional hand pull alarm, smoke detector, heat detector, etc.), an event device 106 is removed from the event device loop 105 (e.g., a building manager removes a CO detector and does not replace it), the type of event device 106 in the event device loop 105 is changed (e.g., a smoke detector is replaced as event device 106-2 and the event device 106-2 is replaced with a heat detector), a failure occurs in the event device 106 (e.g., event device 106-4 fails due to dust or other contaminant accumulation), and / or any other type of change in the event device loop 105, a change may occur in the event device loop 105.

[0042] The controller 104 may monitor the event device loop 105 for changes in the event device loop 105. For example, the controller 104 may detect that a change has occurred in the event device loop 105 via changes in electrical measurements of the event device loop 105, by receiving information from a transmission of a non-priority command, or any other method.

[0043] Thus, the controller 104 may determine a modified threshold value (e.g., a modified threshold electrical measurement) in response to detecting a change in the event device loop 105. Similar to the method described above, the controller 104 may calculate a modified maximum current value on the event device loop 105 that corresponds to the current value when all event devices 106 are activated simultaneously. Thus, the controller 104 may calculate a modified maximum current value based on all event devices 106 (e.g., the type of event devices 106, how much current they consume, etc.) being activated simultaneously and designate the modified maximum current value as the modified threshold value. The modified threshold value may then be used to compare with the electrical measurement determined by the controller 104, as described above.

[0044] Therefore, command transmission based on electrical measurements in an event system according to the present disclosure allows for dynamic monitoring of electrical measurements on an event device loop to ensure that priority commands are transmitted over non-priority commands, thereby ensuring that priority commands are received by event devices on the event device loop. In addition to allowing lower power and / or traditional control panels to drive higher event device loop loads, it also allows control panels to be designed with lower voltages to allow for more lower voltage event devices, allowing for higher power event devices on event device loops, longer event device loops, and / or smaller segments of wiring on event device loops, which can allow for safer and lower cost facility operation than previous methods.

[0045] Figure 2 is an example of a method 220 for command transmission based on electrical measurement results in an event system according to one or more embodiments of the present disclosure. The method 220 may be performed by a controller (e.g., previously combined with Figure 1 The controller 104 described herein and in conjunction with Figure 3 Executed by controller 304) as further described.

[0046] At 222, method 220 may include determining, by a controller included in an event device panel, an electrical measurement in an event device loop. For example, the event device loop may include a plurality of event devices. The plurality of event devices may be connected to an event device panel including a controller. In a first example, the controller may determine that the electrical measurement is 200 mA. In a second example, the controller may determine that the electrical measurement is 430 mA.

[0047] At 224, method 220 may include comparing, by the controller, the electrical measurement to a threshold value. In a first example, the controller may compare the electrical measurement of 200 mA to the threshold value of 400 mA. In a second example, the controller may compare the electrical measurement of 430 mA to the threshold value of 400 mA.

[0048] At 226, method 220 may include determining, by the controller, a plurality of commands to transmit. For example, in a first example, the controller may transmit commands to the plurality of event devices in response to the electrical measurement being less than a threshold, wherein the commands include priority commands and non-priority commands. However, in a second example, the controller may transmit priority commands to the plurality of event devices in response to the electrical measurement being greater than a threshold, while delaying transmission of non-priority commands to the plurality of event devices.

[0049] As previously combined Figure 1As described, the plurality of event devices may include firefighting equipment. Such firefighting equipment may include smoke detectors, heat detectors, CO detectors, etc. Therefore, in some examples, the priority command may include a command for activating the firefighting equipment in response to detecting an event. For example, in response to the controller transmitting the priority command to the firefighting equipment (e.g., whether the firefighting equipment is in an alarm state or not), the firefighting equipment may transmit a response to the controller indicating that the firefighting equipment is in an alarm state. Therefore, the controller may transmit another priority command to the firefighting equipment to activate the firefighting equipment.

[0050] In addition, in some examples, the priority command may include a command for causing the fire-fighting device to perform an automatic self-checking procedure. For example, the controller may transmit the priority command to the fire-fighting device to cause the fire-fighting device to perform an automatic self-checking procedure.

[0051] In some examples, the controller can monitor the voltage at the event device panel. In examples where the voltage exceeds a threshold voltage, the controller can generate an alarm.

[0052] Figure 3 is an example of a controller 304 for command transmission based on electrical measurements in an event system according to one or more embodiments of the present disclosure. Figure 3 As shown, the controller 304 may include a memory 332 and a processor 330 for transmitting commands based on electrical measurements in an event system according to the present disclosure.

[0053] The memory 332 may be any type of storage medium that can be accessed by the processor 330 to perform various examples of the present disclosure. For example, the memory 332 may be a non-transitory computer-readable medium having computer-readable instructions (e.g., executable instructions / computer program instructions) stored thereon that can be executed by the processor 330 to perform command transmission based on electrical measurements in an event system according to the present disclosure.

[0054] The memory 332 may be a volatile memory or a non-volatile memory. The memory 332 may also be a removable (e.g., portable) memory or a non-removable (e.g., internal) memory. For example, the memory 332 may be a random access memory (RAM) (e.g., a dynamic random access memory (DRAM) and / or a phase change random access memory (PCRAM)), a read-only memory (ROM) (e.g., an electrically erasable programmable read-only memory (EEPROM) and / or a compact disc read-only memory (CD-ROM)), a flash memory, a laser disc, a digital versatile disc (DVD) or other optical storage device and / or a magnetic medium (such as a cassette, a tape or a disk), and other types of memory.

[0055] In addition, although the memory 332 is shown as being located within the controller 304, the embodiments of the present disclosure are not limited thereto. For example, the memory 332 may also be located within another computing resource (e.g., enabling computer readable instructions to be downloaded via the Internet or another wired or wireless connection).

[0056] Processor 330 may be a central processing unit (CPU), a semiconductor-based microprocessor, and / or other hardware device suitable for retrieving and executing machine-readable instructions stored in memory 332 .

[0057] Although specific implementations have been illustrated and described herein, those of ordinary skill in the art will appreciate that any arrangement calculated to achieve the same technique may be substituted for the specific implementations shown. This disclosure is intended to cover any and all modifications or variations of various implementations of the present disclosure.

[0058] It should be understood that the above description is given in an illustrative rather than limiting manner.By reading the above description, combinations of the above embodiments, as well as other embodiments not specifically described herein, will be apparent to those skilled in the art.

[0059] The scope of the various embodiments of the present disclosure includes any other applications using the above-described structures and methods.The scope of the various embodiments of the present disclosure should therefore be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

[0060] In the above detailed description, various features are grouped together in the exemplary embodiments shown in the drawings for the purpose of simplifying the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the present disclosure require more features than are expressly recited in each claim.

[0061] Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment.Thus the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment.

Claims

1. A controller (104, 304) for command transmission based on electrical measurements in an event system (100), the controller comprising: Memory (332); and a processor (330) configured to execute executable instructions stored in the memory (332) to: determining electrical measurements in an event device loop (105) comprising a plurality of event devices (106) connected to an event device panel (102); comparing the electrical measurement to a threshold value; as well as Based on the comparison of the electrical measurements with the threshold, a plurality of commands are determined to be transmitted to the event device (106) in the event device loop (105).

2. The controller (104, 304) of claim 1, wherein the processor (330) is configured to execute the instructions to: In response to the electrical measurement being less than the threshold, determining that the plurality of commands include predetermined commands and non-predetermined commands; and The predetermined command and the unscheduled command are transmitted to the plurality of event devices (106).

3. The controller (104, 304) of claim 2, wherein the non-predetermined command is a non-priority command.

4. The controller (104, 304) of claim 1, wherein the processor (330) is configured to execute the instructions to: In response to the electrical measurement being greater than the threshold, determining that the plurality of commands includes only predetermined commands; and Only the predetermined command is transmitted to the plurality of event devices (106).

5. The controller (104, 304) of claim 4, wherein the processor (330) is configured to execute the instructions to schedule a subsequent electrical measurement in response to the electrical measurement being greater than the threshold.

6. The controller (104, 304) of claim 5, wherein the processor (330) is configured to execute the instructions to compare the subsequent electrical measurement to the threshold in response to determining the subsequent electrical measurement.

7. The controller (104, 304) of claim 6, wherein the processor (330) is configured to execute the instructions to transmit the predetermined commands and the non-scheduled commands to the plurality of event devices (106) in response to the subsequent electrical measurement being less than the threshold.

8. The controller (104, 304) of claim 1, wherein the predetermined command is a priority command.

9. The controller (104, 304) according to claim 1, wherein the processor (330) is configured to execute the instructions to determine the threshold by calculating the maximum current value on the event device loop (105) when all of the event devices (106) on the event device loop (105) are activated simultaneously.

10. The controller (104, 304) of claim 9, wherein the processor (330) is configured to execute the instructions to determine the threshold by designating the maximum current value as the threshold.

Images