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

Protection and control

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Basic functions

Function block

Figure 15: Function block

Functionality

The function block represents the IEC61850 GOOSE communication monitoring and

diagnostics in the relay. Function block includes the GOOSE diagnostic counters

that can be accessed via HMI, and ALARM output.

ALARM output indicates if overall GOOSE communication status is good or not.

If ALARM output status is "False", all GOOSE inputs are receiving data within the

timeout limits. If the output is "True", there is an issue (e.g. timeout or decoding),

with one or more of GOOSE inputs in the relay.

For more information on the GOOSE configuration and monitoring refer to the

IEC61850 engineering manual.

Serial port supervision SERLCCH

Function block

Figure 16: 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.

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