Example 3: Depressurize, Start/Stop On
Setpoint: 50 psi
Hysteresis of digital outputs: 20 psi
Number of stages: 3
Hysteresis of analog output: 25 psi
5.7 Control Mode 6 - Analog and digital outputs with activation by
capacities
In this operating mode the analog output works together with the digital outputs in such a way to meet the
system demand in full. The activation point for each digital output is calculated in accordance with the
output capacity and the number of stages configured. The activation will be made such that the digital
stages meet most of the demand, thus leaving only the residual needs for the analog output. Due to the
fact that this operating mode uses digital and analog outputs, the controller will assume the hysteresis that
is equal to the sum of the following functions: "digital output hysteresis" and "analog output hysteresis."
When the operation mode is in depressurize, the controller works to decrease the read pressure until
reaches setpoint value. If it is working in the pressurize mode, the controller works to increase the read
pressure until reaches setpoint value.
If the Start / Stop function is enabled, the first digital output starts to act as enabling control for a frequency
inverter. At depressurize mode, if the read pressure is less than or equal to the setpoint, the OUT 1 output
will be with the relay off, otherwise, if the read pressure is greater than the setpoint, the OUT 1 output will
be with the relay on.
As the demand will be the same percentage for pressurization or depressurization mode, the following
example is for both cases.
Capacity of digital output 1 (OUT1): 10%
Capacity of digital output 2 (OUT2): 20%
Capacity of digital output 3 (OUT3): 30%
Capacity of digital output 4 (OUT4): 30%
Hysteresis of digital outputs: 10 psi
Capacity of analog output (ANALOG): 40%
Hysteresis of analog output: 10 psi
Setpoint: 40 psi
The activation levels will be as follows: (NOTE: the activation level of the analog output is proportional to
the demand being supplied, for example: when the analog output is supplying 40% of the demand (full
capacity), it will have the output at 100% (10 Vcc). When the analog output has to supply 20% of the
demand (half capacity), it will have the output at50% (5 Vcc).
Note: When the user wants to use the Start / Stop output in control mode for capabilities with
analog and digital outputs, the number of stages (F16) follows the following rule:
1 Stage: uses OUT1 output only (Start/Stop)
2 Stages: use OUT1 output (Start/Stop) and capacity of stage 2
3 Stages: use OUT1 output (Start/Stop), capacity of stage 2 and capacity of stage 3
4 Stages: use OUT1 output (Start/Stop), capacity of stage 2, capacity of stage 3 and capacity
of stage 4
Example 1: Depressurize, Start/Stop Off (Setpoint: 40 psi)
Analog
output
Demand
Setpoint
OUT4
25%
0%
OUT3
50%
75%
OUT2
100%
OUT1
60%
10%
70%
20%
80%
30%
90%
40%
100%
50%
Time
Time
Time
Digital
outputs
Example 4: Pressurize, Start/Stop On
Hysteresis of digital outputs: 20 psi
Number of stages: 3
Hysteresis of analog output: 25 psi
Setpoint: 50 psi
Example 3: Depressurize, Start/Stop On
Setpoint: 40 psi Analogic hysteresis = 10
Digital hysteresis = 10 Number of stages = 4
Stage capacity: OUT2=10, OUT3=20, OUT4=30 and Analog=40%
40 psi
41 psi
42 psi
43 psi
44 psi
45 psi
46 psi
47 psi
48 psi
49 psi
50 psi
51 psi
52 psi
53 psi
54 psi
55 psi
56 psi
57 psi
58 psi
59 psi
60 psi
40 psi
41 psi
42 psi
43 psi
44 psi
45 psi
46 psi
47 psi
48 psi
49 psi
50 psi
51 psi
52 psi
53 psi
54 psi
55 psi
56 psi
57 psi
58 psi
59 psi
60 psi
Pressure
Pressure
Demand
Demand
0 (%)
5 (%)
10 (%)
15 (%)
20 (%)
25 (%)
30 (%)
35 (%)
40 (%)
45 (%)
50 (%)
55 (%)
60 (%)
65 (%)
70 (%)
75 (%)
80 (%)
85 (%)
90 (%)
95 (%)
100 (%)
0 (%)
5 (%)
10 (%)
15 (%)
20 (%)
25 (%)
30 (%)
35 (%)
40 (%)
45 (%)
50 (%)
55 (%)
60 (%)
65 (%)
70 (%)
75 (%)
80 (%)
85 (%)
90 (%)
95 (%)
100 (%)
OUT1
OUT1 (10%)
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
ON
ON
ON
OUT2 (10%)
OUT2 (20%)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
ON
OUT3(20%)
OUT3 (30%)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OUT4(30%)
OUT4 (30%)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ANALOG
AN. (40%)
0
12.5
25
37.5
50
62.5
75
87.5
100
12.5
0
12.5
0
12.5
25
37.5
50
62.5
75
87.5
100
0
12.5
25
37.5
50
62.5
75
87.5
100
0
0
12.5
0
12.5
0
12.5
0
12.5
0
12.5
25
The graph below illustrates either example 1 and example 2.
Example 2: Pressurize, Start/Stop Off (Setpoint: 60 psi)
60 psi
59 psi
58 psi
57 psi
56 psi
55 psi
54 psi
53 psi
52 psi
51 psi
50 psi
49 psi
48 psi
47 psi
46 psi
45 psi
44 psi
43 psi
42 psi
41 psi
40 psi
Pressure
Demand
0 (%)
5 (%)
10 (%)
15 (%)
20 (%)
25 (%)
30 (%)
35 (%)
40 (%)
45 (%)
50 (%)
55 (%)
60 (%)
65 (%)
70 (%)
75 (%)
80 (%)
85 (%)
90 (%)
95 (%)
100 (%)
OUT1 (10%)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
ON
ON
ON
OUT2 (20%)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
ON
OUT3 (30%)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OUT4 (30%)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
AN. (40%)
0
12.5
25
37.5
50
62.5
75
87.5
100
12.5
0
12.5
0
12.5
0
12.5
0
12.5
75
87.5
100
OUT1
OUT4
OUT3
OUT2
0%
80%
20%
40%
60%
100%
Measured
pressure
Measured
pressure
Analog
output
Digital
outputs
Digital
Hyteresis
Digital
Hyteresis
Setpoint
+6 psi
+12psi
+18 psi
+18 psi
+12 psi
+6 psi
Setpoint
OUT1
OUT4
OUT3
OUT2
0%
80%
20%
40%
60%
100%
Measured
pressure
Measured
pressure
Analog
output
Digital
outputs
Setpoint
-6 psi
-12psi
-18 psi
-18 psi
-12 psi
-6 psi
Setpoint
Digital
Hyteresis
Digital
Hyteresis
-45 psi
-45 psi
+45 psi
+45 psi
