Mitsubishi Melsec-Q Series User Manual page 479

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Table12.10 Output circuit troubleshooting (Continued)

Erroneous output due to the stray capacitance (C) between

collector and emitter of hotocoupler.

There is no erroneous output at normal load.

An erroneous output may occur at high sensitivity load

(such as solid state relay).

Output module, Combined module

Photocoupler

external power

supply turns

on, the load is

turned on for a

voltage circuit

CHAPTER12 TROUBLESHOOTING

Countermeasure

When turning on or off the external

power, check that the external power

supply rising edge is 10ms or more, and

switch the SW1 to the primary side of

external power supply.

external power supply

When switching to the secondary side of

the external power supply is required, the

external power supply rising edge

connected a condenser must be slow,

and measured 10ms or more.

Source output

*: Measures will not be effective to the

following module due to the characterictic

of external power supply circuit.

Programmable

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