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Precautions - Mitsubishi Electric QJ71DN91 User Manual

Melsec q series, devicenet master-slave module.
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9 DEDICATED INSTRUCTIONS

9.1 Precautions

9
9 - 2
(1) Before executing Data consistency dedicated instruction
Before executing Data consistency dedicated instruction, check the following
items.
(a)
Compatible module versions
Use the modules with the following serial numbers.
• The QCPU with the first five digits of the serial number is "02092" or later
(b)
Setting of Data consistency dedicated instruction setting area
Enable the corresponding bit of Data consistency dedicated instruction
setting area (address: 0633
POINT
When the corresponding bit of Data consistency dedicated instruction setting area
(address: 0633
) is disabled, Data consistency dedicated instruction cannot be
H
executed, and no error occurs.
(c)
Data transfer between devices while Data consistency dedicated instruction
is executed
When using Data consistency dedicated instruction, do not use the
following methods for data transfer between devices.
Doing so may result in data inconsistency.
• Auto refresh
• MOV instruction
• FROM/TO instruction
(2) Transmission delay time when Data consistency dedicated
instruction is used
When Data consistency dedicated instruction is used, transmission delay time
becomes longer. (Refer to Section 3.5.3.)
(3) Execution timing of Data consistency dedicated instruction
After enabling the corresponding bit of Data consistency dedicated instruction
setting area (address: 0633
once per sequence scan.
(4) Operation when Data consistency dedicated instruction is not
executed
After enabling the corresponding bit of Data consistency dedicated instruction
setting area (address: 0633
sequence scans, an error occurs.
• When using the master function
Error Set Signal for Master Function (X03) turns ON and the error code is stored
in Error Information for Master Function (address: 01B1
• When using the slave function
Error Set Signal for Slave Function (X08) turns ON and the error code is stored
in Error Information for Slave Function (address: 0601
). (Refer to Section 3.4.16.)
H
), execute Data consistency dedicated instruction
H
), if the dedicated instruction is not executed in three
H
MELSEC-Q
).
H
).
H
9 - 2

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