Siemens SICAM 7KG85X - Bus Protocol IEC 60870-5-103; Function Description; Configuration Via Web

Serial Server
Table 2-24 Description of the Parameters in the Serial Server
Parameter Description
Good messages Total number of messages received that were detected as valid Modbus messages
CRC errors Total number of messages received in which CRC errors were detected
Exception responses Counters of the transmitted exception response messages
Broadcast messages Total number of the broadcast messages received with the server address 0
Access rights violations Total number of write accesses received if the parameter Access rights is set to
Read only in the Communication serial window.
Bus Protocol IEC 60870-5-103
Function Description
The serial communication using the IEC 60870-5-103 protocol is executed via the RS485 interface.
Configuration via Web Pages
Configuration of the Serial Communication with IEC 60870-5-103 via RS485 Interface
To change the IEC 60870-5-103 settings in the Configuration tab, proceed as follows:
•
In the navigation window, click Communication serial and select IEC 60870-5-103 as the Bus protocol.
•
Configure the respective parameters according to the following table.
Settings for Communication Serial, IEC 60870-5-103
Parameter
Default Setting Setting Range
Bus protocol Modbus RTU None
Modbus RTU
IEC 60870-5-103
Device address 1 1 to 254
Baud rate 9600 bit/s 9600 bit/s
19 200 bit/s
38 400 bit/s
Measured value range 120 %
equivalent to a measured value
range from -4096 to +4095 (-120
% to +120 %)
120 %
240 %
equivalent to a measured value
range from -4096 to +4095 (-120
% to +120 % or -240 % to +240 %)
Transmit energy No Yes (every minute)
No
Transmission of the 1st to 40th
harmonics HV and HI
No No
Yes
Cyclic sending period 50 * 100 ms 30 * 100 ms to 600 * 100 ms
Communication supervision time 600 * 100 ms 0 s = none
100 ms to 6 553 400 ms
i
i
NOTE
For the serial communication with IEC 60870-5-103, the parity is permanently set to even.
2.7.2
2.7.2.1
2.7.2.2
Basic Functions
2.7 Serial Communication
SICAM, SICAM P850/P855 7KG85X, Manual 77
E50417-H1040-C482-A9, Edition 03.2022