Details Of I/O Signals - Mitsubishi Electric MELSEC iQ-R Series User Manual

Details of I/O signals

This appendix describes on/off timing and conditions of I/O signals.
Module failure: X0
This signal indicates whether the module is normal or faulty.
Off: Module normal
On: Module failure
Module failure
(X0)
Module ready
(XF)
Own station data link status: X1
This signal indicates the data link status of the own station.
'Operation status of own station' (SB006E) has the same functionality. Use either of X1 or 'Operation status of own station'
(SB006E) for programming.
Note that the on/off conditions of X1 are the opposite to those of 'Operation status of own station' (SB006E). The conditions of
X1 are as follows:
Off: Data link stop
On: Data link in progress
Data link status of other stations: X3
This signal indicates the data link status of other stations (remote station, local station, intelligent device station, and standby
master station).
'Data link status of other stations' (SB0080) has the same functionality. Use either of X3 or 'Data link status of other stations'
(SB0080) for programming.
Off: All stations normal
On: Faulty station found (The status of the faulty station is stored in 'Data link status of other stations' (SW0080 to SW0083).)
It takes maximum of six seconds for 'Data link status of other stations' (X3) to turn on after a slave station
connected to the master station or local station becomes faulty. The time until this signal turns on differs
depending on the system configuration and error status.
Module ready: XF
This signal indicates whether the module is ready for operation. When the module becomes ready, this signal turns on.
When the module is in the following state, this signal turns off.
• When Module failure (X0) turns on
Module ready
(XF)
Module failure
(X0)
APPX
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Appendix 2 I/O Signals
Power-on