Serial Port Supervision Serlcch; Function Block; Functionality; Assigning Of A Serial Communication Protocol To A Com Serial Port - ABB RELION REX640 Technical Manual

1MRS759142 C
3.2.6
3.2.6.1
3.2.6.2
3.2.7
3.2.8
REX640
Technical Manual

Serial port supervision SERLCCH

Function block

SERLCCH1
CH1LIV
LNK1LIV
GUID-80EDD5DC-F5E0-4676-A560-1BE0ED6CFD39 V1 EN
Figure 13: Function block

Functionality

The serial port supervision function SERLCCH represents one serial communication
port driver. Depending on the hardware configuration, the protection relay can be
equipped with two UART-based serial communication ports. The communication
ports can be both galvanic (RS-485) or one port could be fiber-optic. The protection
relay uses the ports for serial communication protocol links.
Serial communication drivers are identified in the device configuration as COM1 and
COM2, which correspond to function blocks SERLCCH1 and SERLCCH2,
respectively. Each COM port driver has its own setting parameters on the HMI under
Configuration/Communication/COMn (n=1,2).
Output LNKxLIV is active (TRUE) whenever characters are received on the serial
interface. Output CHxLIV is active (TRUE) while complete link frames are received.
Both outputs go to FALSE state after 15 seconds of inactivity on the port.
Assigning of a serial communication protocol to a COM serial
port
The settings of the serial communication protocol instance include a setting
parameter, called either Port or Serial port, which is used to select the COM1 or
COM2 setting.
Since not all serial protocol standards allow changes in link
parameters, all link setting parameters are not found in the COMn
settings. Additional link setting parameters are found in the setting
parameter list of the used serial protocol.

Physical locations of the serial channels

The physical location of the COM1 and COM2 drivers depends on the link mode used
which, in turn, depends on the used communication hardware option. Serial channels
can be found on communication boards COM1004...COM1005.
Section 3
Basic functions
91