Serial communication link setup in the IED is divided between serial driver setup and protocol link setup. Serial drivers are related to the physical serial ports of the IED. If the IED has two physical ports, they are named COM1 and COM2. Setting parameters for COMn (n = 1 or 2) ports are found in . The COMn setting parameters are protocol-independent and related to the physical link. The communication speed is set in the COMn parameters.
Note: For the COM port parameter settings and hardware setup, see the technical manual.
Note: The COM port connection type, optical ST or EIA-485 connection, star or loop topology, idle state (light on or light off) and the bias and bus termination are selected with the COM port jumpers.
Note: Depending on the communication card, the optical connection may be available only for one COM port (1 or 2). See the technical manual for more information.
Once the COMn port is configured, the next step is to attach the IEC 60870-5-103 protocol to the port. This is done by the setting parameters of the communication protocol in question. The IEC 60870-5-103 protocol setting parameters are located in .
For example, serial port has to be set to “COM2” and Address to “25” to attach IEC 60870-5-103 to the COM2 port and assign the link unit address to 25.
- Serial port = “COM2”
- Address = “25”