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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
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