Mitsubishi QJ71MT91 User Manual page 172

9 PROGRAMMING
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(4) Precautions for MODBUS
(a) When setting the MODBUS
sequence program, set the MODBUS
starting method of the intelligent function module switch setting (refer to
Section 6.6) to ON (Start with the user-set parameters).
(b) Turn ON MODBUS
Module READY (X0) and Basic parameter setting existence (X3) have
turned ON.
(c) When the MODBUS
(X9) has turned ON, correct the corresponding parameter in the following
procedure.
1) Refer to the MODBUS
storage area (address: 0C14
erroneous parameter.
2) Refer to the MODBUS
storage area (address: 0C13
correct the parameter.
3) Make a MODBUS
Refer to Section 11.3.1 for details of the MODBUS
parameter error code storage area and MODBUS
parameter setting result storage area.
(d) MODBUS device assignment parameter setting existence (XA) turns ON
R
also when the default parameters exist.
(e) The MODBUS
offline mode (intelligent function module switch 1: 0001
Set the MODBUS
(intelligent function module switch 1: 0000
(f) The QJ71MT91 sends an exception response to the master if it receives a
MODBUS device data read/write request message from the master before
R
the MODBUS
(g) MODBUS device assignment parameter setting via a sequence program
R
can be made again at any time after power-up of the QJ71MT91.
REMARK
Refer to Section 6.6.1 for details of whether each function can be executed or not
depending on the MODBUS
®
device assignment parameter setting
device assignment parameters with a
R
device assignment parameter setting request (Y8) after
R
device assignment parameter setting, error completed
R
device assignment parameter setting result
R
to 0C15
H
device assignment parameter error code
R
(3091)) to check the error details, and
H
device assignment parameter setting request again.
R
device assignment parameter setting is not allowed in the
R
device assignment parameters in the online mode
R
device assignment parameters are set normally.
R
device assignment parameter setting existence.
R
MELSEC-Q
device assignment parameter
R
(3092 to 3093)) to identify the
H
device assignment
R
device assignment
R
).
H
).
H
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