Hitachi NJI-350B - Manual (Page 290)

Chapter 13 Troubleshooting
13-15
(g) The PWM and pulse output does not operate
The CPU operates, but the pulse output and PWM output are not correct
* Pulse output only. 2 kHz is the upper
limit for PWM output.
Turn on the setting enabling
request flag ON using
peripheral devices
YES
NO
Set the operating mode for the
peripheral devices
Note:The operating mode can
only be changed while the
CPU is being stopped
Set the I/O functions on devices
such as peripheral devices
YES
NO
YES
NO
Set the pulse input to be a total
of 5 kHz or less*
NO
YES
Check the output area
YES
NO
Check the output area
NO
YES
The expected pulse output from
the relay is not output
• 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
• Check the output power supply
• Malfunction due to noise
Are the various
settings valid?
Are the operating mode
settings correct?
Are the I/O function
settings correct?
The total pulse output
exceeds 5kHz?
Does it operate as
normal output?
Pulse is output using
the relay output
YES
Wait until the write to the
backup memory is completed.
*1 Pulse output only.
Is the backup
memory being
written? *1
NO