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Devices, systems, and methods regarding a plc system fault

A fault and marking technology, applied in general control systems, control/regulation systems, test/monitoring control systems, etc., can solve problems such as faults

Active Publication Date: 2009-09-02
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PLCs can be susceptible to malfunctions caused by equipment failures and / or data transmission errors (such as I / O channel errors)

Method used

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  • Devices, systems, and methods regarding a plc system fault
  • Devices, systems, and methods regarding a plc system fault
  • Devices, systems, and methods regarding a plc system fault

Examples

Experimental program
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Embodiment Construction

[0009] Certain demonstrative embodiments may provide a method that may include providing a signal indicative of setting a single bit flag. The flag is set for a scan cycle in response to detecting a fault in an input / output (I / O) device of the PLC system or an I / O interface of the PLC system.

[0010] Certain exemplary embodiments may provide fault indication flags available to the user of the PLC. The fault indication flag may be a single bit adapted to provide the central processing unit (CPU) of the PLC, one or more modules communicatively coupled to the PLC, add-in cards included with the PLC, communicatively coupled to the A system-wide indication of the trouble-free performance of additional modules of the PLC, and / or memory cards (MMCs) etc. associated with the PLC. If any one of a predetermined set of such devices indicates a diagnostic problem that may include an invalid quality indication, the CPU may set the fault indication flag to a value indicative of a fault. ...

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PUM

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Abstract

Certain exemplary embodiments comprise a method, which can comprise providing a signal indicative of a set single bit flag. The flag can be set for a scan cycle responsive to a detection of a fault in an Input / Output (I / O) device of a programmable logic controller (PLC) system or an I / O interface of the PLC system.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to pending US Provisional Patent Application Serial No. 60 / 836,235 (Attorney Docket 2006P16616US), filed August 8, 2006, which is hereby incorporated by reference in its entirety. Background technique [0003] Programmable logic controllers can be used to monitor parameters and / or control devices. One or more sensors may be communicatively coupled to a programmable logic controller (PLC) through one or more input / output (I / O) modules. Through I / O modules, PLC can control one or more devices, such as rheostats, switches, sequencers, stepper motor controllers, servo controllers, actuator controllers, stepper drives, servo drives, stepper motors, Servo motors, linear motors, electric motors, ball screw sets, servo valves, hydraulic actuators and / or pneumatic valves, etc. PLCs may be susceptible to malfunctions caused by equipment failures and / or data transmission errors such as I / O channel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/00
CPCG05B19/058G05B2219/14038G05B19/05G05B23/00
Inventor T·L·富顿L·特拉普H·富赫斯
Owner SIEMENS AG