PLC Programmable Indicator Remote Logging Control
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Solution Overview
Problem
Conventional programmable logic controller (PLC) systems require direct user intervention for setting operations to acquire logs, limiting the ability to obtain logs at desired times without manual configuration.
Innovation Solution
A communication system that allows an information processing device to control a programmable indicator to start, stop, and manage logging functions remotely, enabling the acquisition, storage, and transmission of log files with clock time information, and allowing for remote access and deletion of logs through a server device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If direct setting operation is performed on the programmable indicator to acquire logs, then the logging function can be activated, but the operation complexity and user intervention requirements increase
Solution Approach 1:
The patent introduces an information processing device as an intermediary between the user and the programmable indicator. This device communicates with the indicator via a network, allowing users to activate, control, and manage the logging function remotely without directly operating the indicator's settings. The intermediary handles command transmission and log retrieval, automating the process while simplifying user interaction.
2Adaptability or versatility
If logs are managed locally on the programmable indicator, then log acquisition is straightforward, but log retrieval and management flexibility are limited
Solution Approach 1:
The patent transitions log management from a single-device local system to a distributed network-based system. Logs are not only stored locally on the programmable indicator but can also be retrieved and managed remotely through the information processing device via network communication. This adds a spatial dimension to log management, enabling flexible access from different locations and devices while maintaining centralized control.
3Reliability
If the logging function is continuously active on the programmable indicator, then log data is always available, but energy consumption and memory usage increase
Solution Approach 1:
The patent implements dynamic control of the logging function through remote commands. The information processing device can send start/stop commands to the programmable indicator based on actual needs. This allows the logging function to be activated only when required, rather than running continuously, thereby reducing energy consumption and memory usage while maintaining log availability when needed. The system adapts its logging behavior dynamically based on operational requirements.
Data Source
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AI summary
One aspect of the present invention provides a PLC system (1000, 1000A) that can cause a programmable indicator (4, 4A, 4B) to acquire a log in desired timing of a user without directly performing setting operation on the programmable indicator (4, 4A, 4B). The PLC system (1000, 1000A) includes a PC (5) and the programmable indicator (4, 4A, 4B) having a logging function. When receiving input operation to turn on the logging function, the PC (5) performs processing of transmitting a control command (C1) for performing the logging function to the programmable indicator (4, 4A, 4B). The programmable indicator (4, 4A, 4B) turns on the logging function when receiving the control command (C1) from the PC (5).