Graphic depiction of latch function window
62
Graphic depiction of relay action setpoint
Relay units
100
90
80
70
60
Setpoint = 50
50
Hysteresis = 10
40
30
20
Off N.O.
On N.O.
Off N.O.
10
On N.C.
Off N.C.
On N.C.
0
10
20
30
40
50
60
70
80
90
100
relay action: increasing
Graphic depiction of relay action Window
Relay units
100
90
80
70
Hysteresis = 5
Setpoint High = 60
60
50
Setpoint Low = 40
40
Hysteresis = 5
30
20
Off
1
Off
1
Off
10
On
2
On
2
On
0
30
40
50
80
90
100
10
20
60
70
relay function: Window (shown for increasing signal)
Contact: Closed inside window =
1
Contact: Open inside window =
2
Relay units
100
90
80
70
Hysteresis = 10
60
Setpoint = 50
50
40
30
20
Off N.O.
On N.O.
10
On N.C.
Off N.C.
t
0
10
20
30
40
50
60
70
relay action: decreasing
Relay units
100
90
80
70
Hysteresis = 5
Setpoint High = 60
60
50
Setpoint Low = 40
40
Hysteresis = 5
30
20
O
ff
1
Off
1
10
On
2
On
2
t
0
30
40
50
80
10
20
60
70
relay function: Window (shown for decreasing signal)
Contact: Closed inside window =
1
Contact: Open inside window =
2
Off N.O.
On N.C.
t
80
90
100
Off
On
t
90
100
63