Mitsubishi Electric MELSEC-Q Series User Manual page 158

(5) Precautions
(a) Processing time
Because one step is executed per link scan, more setting items extend the processing time further than that of
when a program is used.
(b) While Remote device station initialization procedure registration instruction
(SB000D) is on
Data in the remote I/O (RX, RY) and remote register (RWr, RWw) stops to be refreshed.
(c) Handling of signals that are required to be always on (such as CH. Conversion
enable flag of an AJ65BT-64RD3/4)
Turning off Remote device station initialization procedure registration instruction (SB000D) after the initial
process is completed turns off all the RY signals that have turned on while the initial procedure registration is
performed. To prevent this, use a program to turn on signals that are required to be always on.
(d) Turning on Completion status of remote device station initialization procedure
(SB005F)
When Specification of remote device station to be initialized (SW0014 to SW0017) is selected, Completion
status of remote device station initialization procedure (SB005F) does not turn on until the procedure
registration is normally completed in all the stations. If a faulty station exists, turn off Remote device station
initialization procedure registration instruction (SB000D) depending on the completion status of other stations.
(e) Initialization procedure registration for a standby master station
The initial setting cannot be configured in a standby master station. When replacing a remote device station
while a standby master station is operating as a master station, configure the initial setting on a program.
(f) When the instruction is not required
The initialization procedure registration instruction may not be required under some situations, such as when
the remote input (RX) is set as a condition device.
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