
5-12
Installing Remote Base Controllers—RBCs SIMATIC 545/555/575 System Manual
PPX:505–6851–A/B and PPX:505–6850–A/B RBCs (continued)
The display at the top of the module (see Figure 5-8) indicates the status of
the RBC. See Table 5-4 for the definition of status displays.
REMOTE BASE
CONTROLLER
STATUS
0 - RBC GOOD
1 - SELF DIAG FAILURE
2 - MODULE MISMATCH
3 - I/O COMM TIME OUT
4 - RAM PARITY ERROR
5 - STANDBY, NO CONF
6 - ADDR MISMATCH
7 - COMM OK, NO CONF
8 - WATCHDOG TIME OUT
C - STANDBY, CONF
Figure 5-8 RBC Status Display
Table 5-4 RBC Status Codes
Display Definition
Communications
to this RBC
Comment/Action
0 RBC Good OK
Fully operational. No errors detected.
Action: None.
1 Self Diagnostics Failure None
Serious malfunction.
Action: Place the system in a safe state and
consult Siemens Technical Support. (In the
U.S.A., call 423–461–2522.)
2 Module Mismatch OK
I/O modules installed in the base do not
match the expected configuration in the
CPU.
Action: Compare the actual configuration of
the base against the configuration expected
by the CPU.
3 I/O Communication Time Out Failed
No communication with the CPU within the
allotted timeout period. Probable causes:
The CPU is not powered, or the I/O channel
wiring is incorrect.
Action: Check CPU power and I/O channel
wiring.
Status Display
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