Configuring The Trip Circuit Supervision Cmtcs - ABB REM 543 Technical Reference Manual

ABB Network Partner
4.1.8.1.
Page 38
REM 543 Protection,
Monitoring and Control
The supervision of the trip circuit is based on the constant current injection principle. If
the resistance of the trip circuit exceeds a certain limit, for instance due to bad contact or
oxidation, or if the contact has welded, the voltage over the supervised contact falls
below 20 V ac/dc (15...20V) and the supervision function of the trip circuit is activated.
If the fault persists, the trip circuit supervision alarm signal ALARM is obtained after
the preset delay time of the function block CMTCS_. As a default, the trip circuit
supervision function is not configured into use.

Configuring the trip circuit supervision CMTCS_

The Relay Configuration Tool can be used to connect the trip circuit supervision input
status signals to the function blocks CMTCS1 and CMTCS2. The configuration of the
blocking signal is user-specific and can only be defined in the machine terminal config-
uration. The trip circuit supervision inputs in the machine terminal configuration are as
follows:
TCS1 and TCS2 inputs in REM 543:
Trip Circuit Supervision 1 input
4.4, TCS1
Trip Circuit Supervision 2 input
4.5, TCS2
CMTCS1
TCSSTATE
BS
Fig. 4.1.8.1.-1. Function block CMTCS1.
Input description
Name Type
TCSSTATE Digital signal (BOOL, active low)
BS Digital signal (BOOL, active high)
Output description
Name Type
ALARM Digital signal (BOOL, active high)
Technical Reference Manual
PS1_4_TCS1
PS1_4_TCS2
ALARM
instance
Part 1, General
Description
Trip circuit supervision input state
from I/O module
Blocking signal for trip circuit super-
vision, e.g. from tripping
Description
Trip circuit supervision alarm