Mitsubishi Electric NZ2MFB2-16A User Manual page 90

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 sneak current of back EMF 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
88
11.4 Examples of Troubles with the I/O Module
+ Back electromotive force - [3]
Load
[2]
Load
[1] Shut off
- Back electromotive force + [3]
Load
[2]
Load
[1] Shut off