User manual

Table Of Contents
Hardware description |
Seite 45
2.3.1.5. Control LEDs
The RS-232/RS-485 module has a series of control LEDs. They are used for
easy visual indication of various state functions.
While switching the module on in normal operating mode, the module should
signalize the following sequence:
-
all five LEDs flashing briefly
-
right LED (I/O access) flashing briefly
In ”special mode”, the following signal sequence should be seen:
-
all five LEDs flashing briefly
-
right LED (I/O access) flashing briefly
-
all five LEDs flashing briefly
2.3.1.5.1. Definition of LEDs
LED
Description
3,3V
Internal 3,3V power supply
5V
Internal 5V power supply
Interface
Activity
Active communication over the RS-232/RS-485 bus
ERROR
Error during serial-transfer (for details see document ”Serial
protocol”)
Inputs:
Change
State change between 2 read-out cylces detected
Outputs:
Auto-Off
Due to timeout, all outputs are switched-off for safety
reasons
I/O Access
CPU-access on the inputs and outputs of the connected
modules