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9
PROGRAMMING
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(4) Precautions for MODBUS device assignment parameter setting
(a) When setting the MODBUS device assignment parameters with a sequence
program, set the MODBUS device assignment parameter 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 device assignment parameter setting request (Y8) after
Module READY (X0) and Basic parameter setting existence (X3) have
turned ON.
(c) When the MODBUS device assignment parameter setting, error completed
(X9) has turned ON, correct the corresponding parameter in the following
procedure.
1) Refer to the MODBUS device assignment parameter setting result
storage area (address: 0C14
erroneous parameter.
2) Refer to the MODBUS device assignment parameter error code
storage area (address: 0C13
correct the parameter.
3) Make a MODBUS device assignment parameter setting request again.
Refer to Section 11.3.1 for details of the MODBUS device assignment
parameter error code storage area and MODBUS device assignment
parameter setting result storage area.
(d) MODBUS device assignment parameter setting existence (XA) turns ON
also when the default parameters exist.
(e) The MODBUS device assignment parameter setting is not allowed in the
offline mode (intelligent function module switch 1: 0001
Set the MODBUS device assignment parameters in the online mode
(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
the MODBUS device assignment parameters are set normally.
(g) MODBUS device assignment parameter setting via a sequence program 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 existence.
to 0C15
(3092 to 3093)) to identify the
H
H
(3091)) to check the error details, and
H
).
H
).
H
MELSEC-Q
9 - 10
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