Siemens SIPROTEC 7SA522 Manual page 29

Operation mode /
Monitor mode
SIPROTEC PROFIBUS-DP - Communication profile
C53000-L1840-B001-03
GlobalSection.DP_OLM_MonitorMode
Devices with communication module up to HW revision 3
Oper. mode
Mode 0 / Transmit echo: (default setting)
The fibre-optical line is constantly checked for breaks in the line-connection.
0 An indication in the case of a line-break can be evaluated in the SIPROTEC
device (ref. to chap. 2.3).
For "Redundancy function" = 1, "Operating mode" always has to be set to 0.
Mode 1:
Select Mode 1 if PROFIBUS devices are conneted to the bus which do not
1
transmit, expect or accept an echo for line-break supervision (no fibre-optical
cable monitoring, ring topologies are not possible in Mode 1).
The parameter corresponds to DIL switch S1 at the OLM/S4 or OLM/G12 (in compat-
ibility mode).
Devices with communication module from HW revision 4
Oper. mode
OLM V2 compatible, Mode 0 / Transmit echo: (default setting)
The fibre-optical line is constantly checked for breaks in the line-connection.
0 An indication in the case of a line-break can be evaluated in the SIPROTEC
device (ref. to chap. 2.3).
For "Redundancy function" = 1, "Operating mode" always has to be set to 0.
OLM V2 compatible, Mode 1:
1 Select Mode 1 if PROFIBUS devices are conneted to the bus which do not
transmit, expect or accept an echo for line-break supervision.
OLM V3 compatible: Mode depends on parameter "Redundancy function"
"Redundancy function" = 0
Line or Star topology with optical fibre link monitoring
10 "Redundancy function" = 1
Redundant optical ring
An indication in the case of a line-break can be evaluated in the SIPROTEC
device (ref. to chap. 2.3).
OLM V3 Modus: Mode depends on parameter "Redundancy function"
"Redundancy function" = 0
11 Line or Star topology without optical fibre link monitoring
"Redundancy function" = 1
Redundant optical ring
The parameter corresponds for Operating modes 0 an 1 to DIL switch S1 at the OLM/
S4 or OLM/G12 (in compatibility mode).
The parameter corresponds for Operating modes 10 an 11 to settings of DIL switches
S1 to S4 at the OLM/G12.
Note:
Both optical channels are always adjusted identically in the OLM V3 mode at the
SIPROTEC communication module unlike the possible settings at the SIMATIC NET
OLM/G12 for operating mode "Line" (i.e. both channels with or both channels without
line-break monitoring).
Parameters and properties
Meaning
Meaning
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