When A Load Momentarily Turns On Before The Completion Of The Initial Processing - Mitsubishi Electric MELSEC iQ-RX40NC6B Application User's Manual

When a load momentarily turns on before the completion of the
initial processing
Check item
Check whether output momentarily turns on in the following condition:
Depending on the capacity (C) between the drain and source of a MOSFET,
the load current may flow as shown in the figure below, and thus the load may
momentarily turn on before the completion of the initial processing of the
output module with diagnostic functions (before the RUN LED of the output
module with diagnostic functions turns on).
Internal
circuit
t1: Output turns on for approx. 200s.
Y0
t1
C
Load
TB1
C
Load
TB16
24VDC
TB17
Constant-voltage
circuit
TB18
Action
Use a load or device with the response speed of 1ms or longer.
3.3 Troubleshooting by Symptom
3 TROUBLESHOOTING
3
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