Operating States - SBC PCD3 Series Manual

Saia-Burgess Controls AG
3.11

Operating states

The CPU knows the following operating states:
Operating condition Short description
Start
Run
Run conditional
Run with error
Run conditional with
error
Stop
Stop with error
Stop
System diagnostics
Reset
Hardware manual for PCD3 series │ D ocument 26-789 ENG19│ 2 018-06-29
PCD3.Mxxx0 Classic CPU and expansion enclosure
Self-diagnosis during approx. 1s after starting up or after a restart
Normal execution of the user program after start. If a programming
device is connected via a PCD8.K11x in PGU mode (for example, PG5
in PGU mode), the CPU does not automatically go to the Run status for
safety reasons, but to the Stop status instead
Conditional run operation. A condition was set in the debugger (Run
Until...) that has not yet been fulfilled
Same as under Run, but with an error message
Same as under conditional run, but with error message
The Stop status occurs in the following cases:
- Programmer connected in PGU mode when starting up the CPU
- PGU stopped with programmer
- A conditional run requirement has been fulfilled
Same as under Stop, but with error message
The stop status occurs in the following cases:
- Command stop processed
- A fatal error in the user program
- Hardware error
- No program loaded
- Missing communication mode for a S-Bus PGU or Gateway Master
Port
If the PLC does not enter RUN mode after 2 minutes, it must be returned
for repair
The reset status has the following causes:
- Supply voltage is too low
- Firmware does not start
Operating states
3
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