Reaction When Im 308-C Is Switched To Off, St Or Rn - Siemens SIMATIC S5 Manual
Distributed i/o system
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IM 308-C – starting ET 200
Reaction of the
IM 308-C
Table 11-3 Reaction when IM 308-C is switched to OFF, ST or RN
Preconditions
CPU
IM 308-C
reporting
Stop /
St
Off
Run
Stop /
Off
St
Run
PEU
Stop /
RN
ST
Run
Stop
ST
RN
RUN
ST
RN
1
The modes of the IM 308-C are as defined in Table 11-2.
2
At least one DP slave must be configured for this error-reporting mode.
11-8
Table 11-3 indicates the reaction when the mode selector switch of the active
DP master on the bus is set to OFF, ST or RN.
Precondition: It is assumed that all DP slaves connected to the bus are
addressable. If this is not the case, you must also make provision for the
reactions occurring when bus communication is interrupted or when a DP
slave fails (see Section 11.2.4).
Note
If you have selected "PEU" as the error-reporting mode and the IM 308-C is
OFF, "QVZ" (time-out) is reported instead of "PEU" (powerfail on
expansion unit).
PS
Error-
mode
–
No access to the inputs/outputs of the
distributed I/O system.
2
QVZ
No access to the inputs/outputs of the
distributed I/O system.
2
/None Inputs are set to "0", outputs cannot be set.
2
QVZ
No access to the inputs/outputs of the
distributed I/O system.
2
PEU
/
Inputs are set to "0", outputs cannot be set.
None
–
Inputs of the DP slave set to current
values.
–
Inputs of the DP slave set to current
values.
Reactions
CPU
IM 308-C
CLEAR
1
DP slaves
OFF
Status of outputs
is sustained.
STOP
Status of outputs
is sustained.
STOP
Outputs are set to
"0".
Outputs are set to
"0".
RUN
Outputs are set to
current values.
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
- Quick Links:
- IM 308-C Master Interface
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