Diagnosis LEDs¶
All S500 modules have LEDs for the display of operating statuses and error messages. They indicate:
| LED | Status | Color | LED = ON | LED = OFF | LED flashes |
|---|---|---|---|---|---|
| Input | digital input | yellow | input = ON | input = OFF | – |
| analog input | yellow | brightness depends on the value of the analog signal | – | ||
| Output | digital output | yellow | output = ON | output = OFF | – |
| analog output | yellow | brightness depends on the value of the analog signal | – | ||
| UP | process voltage 24 V DC via terminal | green | voltage is present | voltage is missing | – |
| PWR | supply voltage 24 V DC via FBP | green | voltage is present | voltage is missing | – |
| S-ERR | Sum Error | red | serious error, data exchange is stopped, depends on the behaviour of the master | no error | error (e.g. error on one channel, data exchange is not stopped |
| FBP | FBP communication | green | communication between FBP and FBP Interface Module is running | communication between FBP and FBP Interface Module is broken | during initialization |
| I/O-Bus | I/O-Bus communication | green | communication between FBP Interface Module and the I/O modules is running | no communication between FBP Interface Module and the I/O modules | error on one I/O expansion module (e.g. one output short-circuited) |
| CH-ERR1 | Channel Error, error messages in groups (digital or analog inputs and outputs combined into the groups 1, 2, 3, 4) | red | serious error within the corresponding group | no error | error on one channel of the corresponding group (e.g. one output short-circuited) |
| CH-ERR2 | red | ||||
| CH-ERR3 | red | ||||
| CH-ERR4 | red | ||||
| CH-ERR *) | Module Error | red | error within the I/O module | – | – |
| *) All of the LEDs CH-ERR1 to CH-ERR4 (as far as they exist) light up together | |||||