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General| Brand | Mitsubishi |
|---|---|
| Model | QJ71LP21 |
| Category | Controller |
| Language | English |
Provides essential safety instructions and warnings before operating the equipment.
Details the key features of the MELSECNET/H remote I/O network system, including communication speed and system configuration.
Details the configuration of single remote I/O networks using optical loop and coaxial cable systems.
Describes the configuration of multiple remote I/O networks using the QnPHCPU, including master and sub-master stations.
Explains the multiplexed remote I/O network configuration for redundant systems using QnPRHCPU.
Details the configuration of multiple remote I/O networks, allowing multiple networks to be connected.
Details RAS (Reliability, Availability, Serviceability) functions, including output reset and automatic return.
Provides a flowchart of the procedures required to perform data link operations.
Explains offline tests for checking network module hardware and cable connections.
Details offline tests performed using GX Developer to check cable connection status.
Explains how to use GX Developer for online network diagnostics to check line status.
Details parameter settings for the remote master station, including network type and common parameters.
Details settings for redundant systems, ensuring consistent modes between master and sub-master stations.
Covers settings for remote I/O modules, including PLC parameters, network parameters, and remote passwords.
Lists the parameters that can be set on the remote I/O station and written to the remote I/O module.
Provides precautions for creating programs using network data, focusing on interlock signals.
Allows multiplexed remote sub-master station to take control when the master station fails.
Details the multiplexed remote master function for redundant systems, covering backup and switching functions.
Explains the backup function of master operation during system switching between control and standby systems.
Explains the remote password function to prevent unauthorized access to remote I/O modules and PLC CPUs.
Details how to check network status using GX Developer's network diagnostic function.
Checks the status of forward/reverse loop errors, communication errors, and transient transmission errors.
Provides a systematic approach to troubleshooting network and module issues.
Lists critical items to check first when troubleshooting network modules and data link issues.
Troubleshoots issues with redundant multiplexed remote I/O networks not operating correctly.
Lists MELSECNET/H error codes, their descriptions, and corrective actions.
Provides a detailed list of MELSECNET/H error codes, their meanings, causes, and corrective measures.
