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S5-115F Manual
Central Processing Unit
The following operator functions are possible on the front panel of the CPU:
•
Plug in a memory submodule
•
Connect a programmer (PG)
•
Connect SINEC L1
•
Select the operating mode
•
Perform an Overall Reset
LEDs indicate the current CPU operating mode. A slot in the CPU front panel contains a plastic card
with the most important operating instructions for the PS and CPU. Figure 4-2 shows the front of
the CPU.
115F
CPU
942
RN
ST
RN
ST
OR
QVZ
ZYK
BASP
EWA 4NEB 811 6148-02
Receptacle for memory submodule
Control panel
Instruction card
Connectors for PG or SINEC L1 LAN
Fault LEDs
QVZ:
ZYK:
BASP: Command output disable
Figure 4-2. Front View of the CPU
System Startup
Time-out
Scan time exceeded
4-3
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