Siemens siprotec 7SA6 User Manual page 177

Other Interfaces
7SA6 Manual
C53000-G1176-C133-1
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Figure 5-52 DIGSI 4, Settings for the rear port — example
For the IEC communication, each SIPROTEC
address assigned to it. There is a total of 254 IEC addresses available. Select an
address from the pull-down menu ,(& OLQN DGGUHVV. Only the addresses which
are within the current address range and have not yet been occupied are displayed.
The setting for the maximum message gap is only applicable when the device is to
communicate using a modem via one of the interfaces. A gap is the maximum
allowable time duration of interrupted transmission within one telegram transmission.
Transfer gaps are created when using modems as a result of data compression, error
correction, and baud-rate differences. For good data transmission between modems,
a setting of  sec is recommended. For poor connections, this value should be
increased.
Large values slow down communications in case of errors. When using a direct PC
connection, 0D[ PHVVDJH JDSV may be set to  sec.
Note:
Do not use front port for modem communication!.
Enter specific settings and addresses to identify devices in the other tabs, if
necessary, or check the preset values.
Device addresses are used by the system to identify each device and must be unique
throughout the substation. Detailed instructions for setting the interfaces are available
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in the "DIGSI 4 Communications" manual.
If you desire to expand or modify interfaces later, refer to the modification instructions
for the interfaces, and if necessary for the hardware, see also instructions in Sub-
section 8.1.3 of this manual.
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device must have a unique IEC
Configuration
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