Functionality - Arc protection - Motor protection - Feeder protection - Back-up protection - Technical Manual - REX610 Protection and control - Relion Protection and Control - 1.2 - IEC - ANSI - 03.05.2023

REX610 Technical Manual

Depending on the relay configuration, the selection of the local/remote mode can be made via a binary input or it can be setting based. The control via binary input can be enabled by setting the value of the LR control setting to "Binary input". The binary input control requires that the CONTROL function is instantiated in the product configuration. The control via setting can be enabled by setting LR control to "Setting based", and L/R control is realized by setting the value of Control authority.

In binary input control, the actual Local/Remote control state is evaluated by the priority scheme on the function block inputs. If more than one input is active, the input with the highest priority is selected. The priority order is “off”, “local”, “remote”, “all”.

The actual state is reflected on the CONTROL function outputs. Only one output is active at a time.

Table 1. Truth table for CONTROL

Input

Output

CTRL_OFF

CTRL_LOC

CTRL_REM

CTRL_ALL

TRUE

N/A

N/A

N/A

OFF = TRUE

FALSE

TRUE

N/A

N/A

LOCAL = TRUE

FALSE

FALSE

TRUE

TRUE

REMOTE = TRUE

FALSE

FALSE

FALSE

TRUE

ALL = TRUE

FALSE

FALSE

FALSE

FALSE

OFF = TRUE