Diagnostics for the input “Digital input”
If the encoder has an alarm or status output, in 1-channel mode this can be connected to the “Digital input” of the terminal and evaluated. The input is 5 V compatible.
The alarm or status output at the encoder is usually implemented with negative logic. This is indicated by the terminal as follows:
Encoder | ED5112 (1-channel mode) | ||
|---|---|---|---|
Alarm output | “Digital input” | LED “Ch. 1 DI” | Meaning |
HIGH level / output open | TRUE | off | e.g. encoder OK |
LOW level / PullDown - level is actively pulled down to LOW | FALSE | red | e.g. encoder malfunction |
If an overvoltage is present at the “Digital input” input, it is displayed as follows:
Fault diagnosis in case of overvoltage at the “Digital input” | Display |
|---|---|
DiagMessage, type “Error”, text ID 0x8315 | Error status input (channel n) |
0xA0n0:05 “Error input status“ | TRUE |
LED: Ch. 1 DI | red |