Mitsubishi QJ71MB91 User Manual

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9.1 Parameter Setting
9.1.2 MODBUS(R) device assignment parameters
9
PROGRAMMING
(4) Precautions for MODBUS device assignment parameter setting
(a) Before setting MODBUS device assignment parameters
When using a sequence program to set MODBUS device assignment
parameters, perform the following in the intelligent function module switch setting.
( Section 6.6)
1) Set the MODBUS device assignment parameter starting method to "User
setting parameter".
2) Set the slave function to either channel 1 or 2 in the mode setting.
If the MODBUS device assignment parameter setting request (Y8) is turned
ON with both channels 1 and 2 set to the master function, the operation mode
error (error code: 7353
H) will occur.
(b) When turning ON the MODBUS device assignment parameter setting request
(Y8)
Make sure both of the following input signal conditions are satisfied.
• Condition 1: Module READY (X0) is ON.
• Condition 2: Intelligent function module switch setting change status (X10) is
OFF.
(c) When the MODBUS device assignment parameter setting, error completed (X9)
is turned ON
Correct the parameters by the following procedure.
1) Refer to the MODBUS device assignment parameter setting result storage
area (address: 0C14
H
to 0C15
H
) to identify the erroneous parameter.(
Section 11.4.1)
2) Refer to the MODBUS device assignment parameter error code storage
area (address: 0C13
H
) to check the error details, and correct the relevant
parameter.( Section 11.4.1)
3) Execute the MODBUS device assignment parameter setting request again.
(d) MODBUS device assignment parameter setting existence
The MODBUS device assignment parameter setting existence (XA) turns ON
even if some default parameters exist.
(e) When a request message has been received before normal setting completion
The QJ71MB91 sends an error response (exception code: 04
H) to the master if it
received from the master the read/write request message to a MODBUS device
before normal completion of the MODBUS device assignment parameter
setting.
(f) Resetting MODBUS device assignment parameters
MODBUS device assignment parameters in sequence programs can be reset at
any timing after the QJ71MB91 is powered on.

Mitsubishi QJ71MB91 Specifications

General

Brand	Mitsubishi
Model	QJ71MB91
Category	Controller
Language	English