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General| Brand | Mitsubishi |
|---|---|
| Model | QJ71MB91 |
| Category | Controller |
| Language | English |
Explains the master and slave functions, communication methods, and settings of the QJ71MB91.
Describes applicable modules, base units, and quantities for the QJ71MB91.
Shows MODBUS network configuration examples using the QJ71MB91.
Provides essential precautions for system configuration, especially for redundant CPUs.
Explains methods to check the function version and serial number of QJ71MB91 and GX Configurator-MB.
Details the performance specifications of the QJ71MB91, including transmission and master/slave functions.
Explains the specifications for the RS-232 interface, including connector and cable details.
Covers RS-422/485 interface specifications, terminal blocks, cables, and precautions.
Lists and describes the I/O signals exchanged between QJ71MB91 and the programmable controller CPU.
Details the buffer memory list, applications, and assignments for the QJ71MB91.
Lists all supported MODBUS standard functions for the QJ71MB91.
Explains the frame specifications for the MODBUS protocol, including RTU and ASCII modes.
Describes MODBUS protocol data unit formats and precautions for message specification.
Explains the request and response message formats for reading coils.
Explains the request and response message formats for reading discrete inputs.
Explains the request and response message formats for reading holding registers.
Explains the request and response message formats for reading input registers.
Explains the request and response message formats for writing a single coil.
Explains the request and response message formats for writing a single register.
Explains the request and response message formats for reading error status.
Details various diagnostic functions and their sub-functions for the QJ71MB91.
Explains how to acquire the number of messages whose actions completed normally.
Explains how to acquire the communications event log of the QJ71MB91.
Explains writing values (ON/OFF) to multiple coils.
Explains writing values to multiple holding registers.
Explains how to acquire information of the mounted slave station into the master.
Explains reading multiple extended file register values.
Explains writing multiple extension file register values.
Explains masking and writing values to a single holding register.
Explains reading from or writing to multiple holding registers.
Lists and describes the functions of the QJ71MB91.
Explains the functions of the QJ71MB91 when operating as a MODBUS master.
Explains the functions of the QJ71MB91 when operating as a MODBUS slave.
Provides essential precautions for handling the QJ71MB91 module correctly.
Outlines the rough procedure for operating the QJ71MB91 in a system.
Identifies and describes the external parts and connectors of the QJ71MB91.
Explains the hardware test and self-loopback test performed before operating the QJ71MB91.
Explains wiring precautions and connection examples for RS-232 and RS-422/485 interfaces.
Details how to set the operation mode, transmission speeds, and station numbers via module switches.
Provides guidelines for maintenance, inspection, and removal/installation of the QJ71MB91 module.
Explains parameter types and methods for setting automatic communication and MODBUS device assignment.
Details the parameters for the automatic communication function when QJ71MB91 is a master.
Explains how to correlate MODBUS devices with PLC memory using assignment parameters.
Lists the functions provided by the GX Configurator-MB utility package.
Provides instructions and precautions for installing and uninstalling the utility package.
Explains common operations and data handling within the utility package.
Describes setting parameters like automatic communication and MODBUS device assignment.
Explains how to configure auto refresh for QJ71MB91 buffer memory data.
Details how to monitor and test the QJ71MB91 operating status and I/O signals.
Explains parameter setting methods and program examples using sequence programs.
Provides program examples for automatic communication and MODBUS device assignment.
Illustrates program examples for setting parameters in MELSECNET/H remote I/O networks.
Lists the dedicated instructions supported by the QJ71MB91 and available devices.
Explains the instruction for reading or writing MODBUS device data to a slave.
Explains communication with a slave using any given protocol data unit in request message format.
Explains the instruction to change intelligent function module switch settings.
Provides methods for troubleshooting errors indicated by LEDs, X signals, and other symptoms.
Explains how to check the QJ71MB91 status using LEDs, GX Developer, and buffer memory.
Details how to check communication status using diagnostic counters for master and slave functions.
Lists and explains various error codes, their storage areas, and corrective actions.
Explains methods to turn off the ERR. LED using GX Configurator-MB, sequence program, or request message.
Details new functions and utility package versions for the QJ71MB91.
Compares performance, functions, and program utilization between QJ71MB91 and A Series modules.
Explains the processing time for master and slave functions and calculation items.
Provides the external dimensions and mounting information for the QJ71MB91 module.
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