Hardware Manual PCD1.M2110R1 │ Document 27-619 │ Version ENG 04 │ 2018-08-20
Saia-Burgess Controls AG
Operating Statuses and their LEDs
CPU / Control Process Unit
3-11
3
3.7
Operating Statuses and their LEDs
Three LEDs (green, red and yellow) show
the possible operating statuses of the CPU
as set out in the following table.
LEDs
PCD1.M2110R1
Meaning
Run
Stop
Error(s)
Key:
Form
●
LED off
Colour
green
red
yellow
●
LED on
Run
●
●
/ LED blink
s
Run conditional
●
/
Run with error
●
Run conditional
with errors
●
/
Stop
Stop with errors
Stop
System diagnostics
●
/
/
/
Battery fault
/
Start
Self-diagnosis for approx. 1 sec. after switch on or restart
Run
Normal processing of the user program after start-up.
Run
conditional
Conditional Run status A condition was set in the debugger (Run until...),
which has not been fulfilled yet
Run with error
The same as Run, but with an error message
Run
conditional
with error
The same as Run
conditional
, but with an error message
Stop
The status Stop occurs in the following cases:
- Programming unit connected in PGU mode while the CPU was switched
on
- PGU stopped by programming unit
-
Condition for BED.RUN was fulfilled
Stop with error
The same as Stop, but with an error message
Halt
The status Halt occurs in the following cases:
- Stop instruction processed
- Serious error in the user program
- Hardware fault
- No program loaded
- No communications mode on the S-bus PGU or Gateway Master Port
System diagnostics
Battery fault
Flashes at interval of 500 ms
Reset
The RESET status has the following causes:
- Supply voltage too low
- Firmware not started
