Chapter 8 Troubleshooting
8-6
8.3.4 Counter value error
No
Yes
Yes
Counter value error
As specified in input
standard?
Let counter input as specified in
standard requirements.
H/W defect
No
Input cable of twisted
shielded?
Yes
Actions prepared
against noise?
Kept away enough
between strong electric
and counter input?
Yes
Counter value identical
when identical value input on Ch0
and Ch1?
Yes
Use twisted shielded cable for
counter input wiring.
No
Remove cause of the noise
No
Keep counter input away from power
cable at least 10cm.
No
Hardware defect
No
Use oscilloscope to measure input
wave to check its type
Input wave type
of frequency exceeded defined
standard?
Recheck pulse input.
Yes
Yes
No
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