Chapter 13 Troubleshooting

(g)The PWM and pulse output does not operate

The CPU operates, but the pulse output and PWM output are not correct

Does it operate as

 

 

NO

 

 

 

 

 

normal output?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check the output area

 

YES

 

 

 

 

Output signal voltage

 

 

 

 

 

 

 

 

 

 

 

Power supply voltage for the

 

 

 

 

 

 

 

load

 

 

 

 

 

 

Terminal stand wiring

 

 

 

 

 

 

Terminal stand connection

 

 

 

 

 

 

Voltage between the

 

 

 

 

 

 

 

common and bit

 

 

 

 

 

 

Wiring

 

 

 

 

 

 

Especially for the S terminal on

 

 

 

 

 

 

the transistor

 

 

 

 

 

 

 

 

 

 

 

Pulse is output using

 

 

YES

 

 

 

 

 

the relay output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The expected pulse output from

 

NO

 

 

 

 

the relay is not output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

Are the operating mode

 

 

 

 

 

 

 

settings correct?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Set the operating mode for the

 

YES

 

 

 

 

peripheral devices

 

 

 

 

 

Note:The operating mode can

 

 

 

 

 

 

 

only be changed while the

 

 

 

 

 

 

 

CPU is being stopped

Are the I/O function

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

settings correct?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Set the I/O functions on devices

 

YES

 

 

 

 

such as peripheral devices

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Are the various

 

 

NO

 

 

 

 

 

settings valid?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn on the setting enabling

 

YES

 

 

 

 

request flag ON using

 

 

 

 

 

peripheral devices

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the backup

 

 

YES

 

 

 

 

 

memory being

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

written? *1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wait until the write to the

 

 

 

 

 

 

 

 

 

 

 

 

backup memory is completed.

 

NO

 

 

 

 

 

 

 

 

 

 

*1 Pulse output only.

The total pulse output

YES

 

 

 

 

 

exceeds 5kHz?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Set the pulse input to be a total

 

 

NO

 

 

 

 

of 5 kHz or less*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* Pulse output only. 2 kHz is the upper

 

 

 

Check the output area

 

 

 

 

limit for PWM output.

Check the output power supply

Malfunction due to noise

13-15

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Image 290
Hitachi NJI-350B manual 13-15