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 bein
g
sto
pp
ed
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 in
p
ut 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?