Manual

13: TROUBLESHOOTING
13-16 WEB SERVER CPU MODULE USER’S MANUAL FC9Y-B1278
Troubleshooting Diagram 8
Troubleshooting Diagram 9
Is the scan time longer than
400 ms?
Change the watchdog timer value in the
Function Area Settings. For details, see
“Watchdog Timer Setting” on page 5-3.
Watchdog timer error occurs
and the CPU does not run.
Call IDEC for assistance.
YES
NO
Are the input ON/OFF
voltage levels correct?
The interrupt/catch input
cannot receive short pulses.
Make sure of correct input voltage.
ON voltage: 15V DC minimum
OFF voltage: 5V DC maximum
YES
NO
Call IDEC for assistance. END