Configuration
4-13
7SS60 Manual
E50417-G1176-C132-A2
4.2.4
Serial interface
4.2.4.1
Function description
Block 72
The 7SS601 measuring system is equipped with a serial RS485 interface. To adapt it
to a PC interface, an RS485/RS232 converter is required. Communication via this
interface requires some data arrangements such as identification of the device, trans-
mission format and transmission rate.
These data are entered to the device in address block
. password input is neces-
sary (refer to section 4.2.1). The data must be matched to the connected devices.
4.2.4.2
Hints on setting
Device address
The identification number of the device within the substation can be set in parameter
'(9,&(
(
). The number can be chosen at liberty, but must be used only once
within the plant system. Setting values between 1 and 254 are possible.
If several modules are series-connected, each 7SS601 “device” must be assigned a
different address in the protection and the PC before operation with the DIGSI PC is
started.
Feeder address
The feeder address is understood to be the unique number of the feeder within the
substation. It is set in parameter
)(('(5
(
). Setting values between 1 and 254
are possible.
Substation address
In case more than one substation is addressed, an identification number for each sub-
station can be assigned in parameter
68%67$
(
). Setting values between 1
and 254 are possible.
Data format
In the parameter
3&6(
(
) the data format of the serial interface can be
matched to the application. The recommended data format for the Siemens protection
data processing program is
',*6,9
. The other setting option is
$6&,,
, e.g. for ter-
minal programs.
Transmission gaps
The setting of the GAPS in the parameter
*$36
(
) is relevant only when the
device is intended to communicate via a modem. The setting is the maximum time pe-
riod which is tolerated by the device when gaps occur during transmission of a tele-
gram. Gaps may occur, when modems are used, by compression of data, error cor-
rection, and differences of the baud rate. Setting values between 0.0 s and 5.0 s are
possible. With good transmission quality between the modems, 1.0 s is recommend-
ed. The value should be increased when transmission quality is not so good. It must
be noted that GAPS must be smaller than the setting of “reaction time protection relay”
in the protection software DIGSI V3. Recommended value:
Higher values for “reaction time protection relay” reduce the transmission speed in
case of transmission errors. If the interface is connected directly to a personal com-
puter, GAPS may be set to 0.0 s.
GAPS
Reaction time protection relay
2
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Summary of Contents for SIPROTEC 7SS60
Page 1: ...E50417 G1176 C132 A2 SIEMENS SIPROTEC 7SS60 V3 1 Centralized Numerical Busbar Protection ...
Page 2: ......
Page 4: ...Siemens Aktiengesellschaft Document No E50417 G1176 C132 A2 ...
Page 8: ...Preface iv 7SS60 Manual E50417 G1176 C132 A2 ...
Page 50: ...Configuration 4 16 7SS60 Manual E50417 G1176 C132 A2 ...
Page 80: ...Control in Operation 6 8 7SS60 Manual E50417 G1176 C132 A2 ...
Page 112: ...Technical Data 9 18 7SS60 Manual E50417 G1176 C132 A2 ...
