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CHAPTER 5: SETTINGS
CONTROL ELEMENTS
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
5-263
5
Figure 5-148: Acknowledge mode
Application example
Consider an application where the selector switch is used to control setting groups 1 through 4 in the relay. The setting
groups are to be controlled from both user-programmable pushbutton 1 and from an external device via contact inputs 1
through 3. The active setting group is to be available as an encoded three-bit word to the external device and SCADA via
output contacts 1 through 3. The pre-selected setting group is to be applied automatically after five seconds of inactivity
of the control inputs. When the relay powers up, it is to synchronize the setting group to the three-bit control input.
Make the following changes to setting group control in the
SETTINGS
CONTROL ELEMENTS
SETTING GROUPS
menu:
SETTING GROUPS FUNCTION
: “Enabled”
SETTING GROUPS BLK
: “Off”
GROUP 2 ACTIVATE ON
: “SELECTOR 1 POS 2"
GROUP 3 ACTIVATE ON
: “SELECTOR 1 POS 3"
842736A1.CDR
STEP-UP
ACK
3BIT A0
3BIT A1
3BIT A2
3BIT ACK
POS 1
POS 2
POS 3
POS 4
POS 5
POS 6
POS 7
BIT 0
BIT 1
BIT 2
pre-existing
position 2
changed to 4 with
a pushbutton
changed to 1 with
a 3-bit input
changed to 2 with
a pushbutton
STP ALARM
BIT ALARM
ALARM