Satec System 295 Installation And Operation Manual page 103

Example 4-6 Sample Of Limited Data Recording
Condition #1 OR
Condition #2 AND
Action #1 Data logging
Action #2 INC counter
Gated Setpoint Operations with Interval Timer
Example 4-7 illustrates how to change the previous example to provide time-gated
recording data for the predefined time on a certain day.
The setpoint will provide recording data every 20 second (assuming that the timer
interval the same as in Example 4-5) on the 12th Aug., 1997, from 08:30:00 to
17:15:00.
Example 4-7 Sample Of Repeated Time-Gated Operations
Condition #1 OR
Condition #2 AND
Condition #3 AND
Condition #4 AND
Action #1 Data logging
In the same way, you can use (instead of time) any numeric or logical trigger to
provide periodical condition-gated operations. The following example illustrates
generating pulses through relay output #1 with a 0.5 second width repeated each 1
second, to provide a flashing alarm signal when real-time total active power through
load exceeds 20200 kW (see Example 4-8). Interval timer #1 is assumed to be
configured for a 1 second count interval.
Operation Techniques
Trigger conditions
Conjunction Trigger parameter
Timer #4
Counter #1
Setpoint actions
Action type
#12
#1
Trigger conditions
Conjunction Trigger parameter
Timer #4
Date
Time
Time
Setpoint actions
Action type
#12
Condi-
≤
Action target
0.1 s
Condi-
=
≥
≤
Action target
0.1 s
Operate Release
tion limit limit
99 99
Delays
Unit Operate Release
0 0
Operateli Releaseli
tion mit mit
970812
083000
171500
Delays
Unit Operate Release
0 0
95