Mitsubishi Electric NZ2GN2S1-16D User Manual page 208

A load momentarily turns on from off when the system is powered off
■Cause
When an inductive load is connected, [2] Load may turn on from off due to a diversion of back electromotive force at [1]
Shutoff.
Output module
Sink output
Y0
ON
Y1
OFF
COM-
CTL+
Output module
Source output
Y0
ON
Y1
OFF
COM+
CTL-
11 TROUBLESHOOTING
206
11.5 Examples of Troubles with the I/O Module
Back electromotive
[3]
force
Load
[2]
Load
[1] Shut off
Back electromotive
- +
[3]
force
Load
[2]
Load
[1] Shut off