User`s manual

8-8
(3)
Control module Output module
Memory
I/F
circuit
(1)
(2)
(2)
LED
Fuse
Power
supply
Hand-held programmer
Common terminal
Output terminal
Load
(5) Check flow 5
This flow shows the checking procedure in the event of abnormality of output signal not detected
by the self-diagnosis of the control module.
Example of the error
- All inputs of specific output module fail to be turned ON.
(In this case, it is highly possible that the fuse of load power output is melted down.)
- Specific output fails to be turned ON (OFF).
- Among output signals of a same output module, operation of a certain output signal affects
other output signal.
Countermeasure: Error output signal
(1) Connect hand-held programmer, and check ON/OFF by monitoring the data memory (output
relay) corresponding to the abnormal output.
(2) Check the state of LED of output module.
(3) Measure the voltage between the corresponding output terminal of the output module and the
common terminal using a tester.
When the inter-terminal voltage is output ON voltage (about 1 V or less): ON
When the inter-terminal voltage is load supply voltage: OFF
Note: When the load power source is OFF and wiring to the load is disconnected, it is abnormal
if the output is normal.
In case of (1) = (2) = (3) Connecting load is error
In case of (1) = (2) = (3) Check the external wiring
(power supply)
OK
Exchange the output module.
In case of the others Exchange the output module.
[The flow of output signal]