Status LEDs
The LEDs are located at the front of module. There are 2 different groups:
- The 4 system LEDs (PWR, CS31, S-ERR and I/O-Bus) show the operation status of the module and display possible errors.
- The 26 process LEDs (UP, inputs, outputs, CH-ERR2 to CH-ERR4) show the process supply voltage and the statuses of the inputs and outputs and display possible errors.
Status of the 4 System-LEDs:
| LED |
Status |
Color |
OFF |
ON |
Flashing |
|---|
| PWR/RUN |
System voltage |
Green |
Process supply voltage missing |
Internal supply voltage OK, module ready for communication with IO Controller |
Start-up / preparing communication |
| CS31 |
CS31 communication |
Green |
No communication at the CS31 bus module |
Communication at the CS31 bus OK |
Diagnosis mode |
| S-ERR |
Sum Error |
Red |
No error |
Internal error |
– |
| I/O-Bus |
Communication via the I/O-Bus |
Green |
No expansion modules connected or communication error |
Expansion modules connected and operational |
— |
Status of the 27 Process LEDs:
| LED |
Status |
Color |
OFF |
ON |
Flashing |
|---|
| DI0 to DI7 |
Digital input |
Yellow |
Input is OFF |
Input is ON (the input voltage is even displayed if the supply voltage is OFF) |
– |
| DC8 to DC15 |
Digital input/output |
Yellow |
Input/output is OFF |
Input/output is ON (the input voltage is even displayed if the supply voltage is OFF) |
– |
| AI0 to AI3 |
Analog input |
Yellow |
Input is OFF |
Input is ON (brightness depends on the value of the analog signal) |
– |
| AO0 to AO1 |
Analog output |
Yellow |
Output is OFF |
Output is ON (brightness depends on the value of the analog signal) |
– |
| UP |
Process supply voltage 24 V DC via terminal |
Green |
Process supply voltage is missing |
Process supply voltage OK |
– |
| CH-ERR2 |
Channel Error, error messages in groups (digital inputs/outputs combined into the groups 1, 2, 3, 4) |
Red |
No error or process supply voltage is missing |
Severe error within the corresponding group |
Severe error within the corresponding group (e.g. short-circuit at an output) |
| CH-ERR3 |
Red |
| CH-ERR4 |
Red |
| CH-ERR *) |
Module Error |
Red |
– |
Internal error |
– |
| *) All of the LEDs CH-ERR2 to CH-ERR4 light up together |
