8.1.4 Input Check

If the program is running but the external input signal is not read normally, check the following points:

Is the input status changed ON/OFF to the corresponding

device operation

Connect the programming

tool, and monitor the corresponding X device state in RUN mode

Not normal

Check whether the X device

is forced or not

Not forced

Check whether the allocation table is identical the actual I/O

Not

Execute the automatic I/O allocation, and check whether the I/O allocation table is now identical to the actual I/O configuration

No

Check the expansion unit Hardware one by one

the expansion rack ?

If not, check the input voltage at the V200’s input terminals.

If the voltage is not normal, check the input device and the cable.

If the voltage is normal, the V200’s input circuit may be faulty.

If the monitored X device state is identical to the state of the input status LED, the cause may lie in the user program or in the environment.

If it is forced, release the force designation then execute the EEPROM write operation.

In force run mode physical inputs and outputs are not updated.

Download the application now and execute ladder.

Replace the faulty unit or else the V200 CPU may be faulty.

Page 119

Page 127
Image 127
Toshiba V200 user manual Input Check