Status LEDs and Operating Elements¶
RUN/STOP switch
The processor modules PM55x-xP and PM56x-xP contain a RUN/STOP switch which can be set with a small screwdriver. In the RUN position, the program loaded in the processor module will be executed and in the STOP position it will be stopped.
When COM1 and COM2 are not in online access mode, the user program can only be changed, uploaded and downloaded if the RUN/STOP switch is in STOP position.
Status LEDs
The processor modules PM55x-xP and PM56x-xP indicate their states of operation via 3 LEDs located on the upper left edge of the processor module.
LED | State | Color | LED = ON | LED = OFF | LED flashing |
---|---|---|---|---|---|
PWR | Power supply | Green | Power supply present | Power supply missing | – |
RUN | RUN/STOP state | Green | Processor module is in state RUN | Processor module is in state STOP | Fast flashing (4 Hz): The processor module is reading/writing data from/to the memory card. If the ERR-LED is also flashing, data is being written to the Flash-EEPROM. Slow flashing (1 Hz): The firmware update from the memory card has been completed successfully. |
ERR | Error indication | Red | An error occurred | No errors or only warnings encountered (E4-errors). The LED behavior for the error classes 2 to 4 is configurable. | With 4 Hz (fast): displays together with the RUN LED a currently running a firmware-upgrade or writing data to the Flash-EPROM. |
I/O LEDs
Each processor module contains up to 15 LEDs (depending on type) to display the states of the inputs and outputs.
Processor module | LED | State | Color | LED = ON | LED = OFF |
---|---|---|---|---|---|
PM55x-xP PM56x-xP |
I0 … I7 (PM55x-xP) I0 … I5 (PM56x-xP) |
Digital input | Yellow | Input is ON | Input is OFF |
O0 … O5 | Digital output | Yellow | Output is ON | Output is OFF | |
PM56x-xP | AI0, AI1* | Analog input | Yellow | Input is ON | Input is OFF |
AO | Analog output | Yellow | Output is ON | Output is OFF | |
*) The analog inputs AI0 and AI1 can be configured as digital input or analog input. |
Status LEDs
LED | Color | OFF | ON | Flashing |
---|---|---|---|---|
Activity | Yellow | No activity | — | Activity |
Link | Green | No link | Link | — |