Example 4-8 Sample Of Repeated Condition-Gated Operations
Trigger conditions
Conjunction Trigger parameter Condi-
tion
Operate
limit
Release
limit
Condition #1 OR Timer #1
Condition #2 AND R-T total kW
≥
20200 20000
Condition #3 AND Relay status OFF
Setpoint actions Delays
Action type Action target Unit Operate Release
Action #1 Operate relay #1 0.1 s 0 5
Manual Setpoint Operations
The next example shows how to manually override setpoint conditions to operate
relay output via communications (see Example 4-9).
Programmable event flag #1 connected as a trigger with an OR operation is used to
provide manual forced setpoint operation. Manual setting of event flag #1 to ON
will immediately (since no operate delay specified) operate the setpoint by overriding
other setpoint conditions. Clearing the event flag does not ensure that the setpoint
will be released if other operate conditions are still fulfilled.
Example 4-9 Sample Of Manual Relay Operations
Trigger conditions
Conjunction Trigger parameter Condi-
tion
Operate
limit
Release
limit
Condition #1 OR R-T total kW
≥
20050 20000
Condition #2 OR R-T total PF Lag
≤
0.75 0.80
Condition #3 OR R-T total PF Lead
≤
0.75 0.80
Condition #4 OR User event flag #1 ON
Setpoint actions Delays
Action type Action target Unit Operate Release
Action #1 Operate relay #1 0.1 s 0 0
In the same example, supposing for condition #4, an OR operation is replaced by an
AND operation, and the ON condition is reversed to OFF, manual clearing of event
flag #1 will force the setpoint to be released regardless of other setpoint conditions.
Manual setting of the event flag will have no effect if other operate conditions are
not fulfilled.
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