Hitachi NJI-350B - Manual (Page 287)

Chapter 13 Troubleshooting
13-12
(e) The counter input does not function
The CPU operates, but the input data is incorrect
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
Turn on the setting enabling
request flag ON using peripheral
devices
• Check the input pulse
• Malfunction due to noise
YES
NO
YES
NO
YES
NO
YES
NO
Set the pulse input to 5kHz or
less
NO
YES
Check the input area
Check the input area
• Check the input signal source
• Malfunction due to noise
• Cable is disconnected
Does it operate as
normal input?
Are the operating mode
settings correct?
Are the various
settings valid?
Are the I/O function
settings correct?
Are pulses that exceed
5 kHz being input?