+2 psi
+4 psi
+6 psi
+8 psi
Setpoint
C1
C1+C2
C1+C2+C3
C1+C2+C3+C4
Hysteresis
Time
Compressor activation step
Step = Hysteresis / Number of stages
Activation pressure of the "N" output
Activation = Se ((N-1) x Step))
For example, if the setpoint is 10psi, the hysteresis is 8psi and the number of stages is 4, the first
compressor will be turned on when the pressure is 12psi, the second at 14psi, the third at 16psi and the
fourth at 18psi. Please note that at 18psi all of the compressors will be turned on.
Setpoint
C1
C1+C2
C1+C2+C3
C1+C2+C3+C4
C2+C3+C4
OFF
Hysteresis
Time
C3+C4
C4
+2 psi
+4 psi
+6 psi
+8 psi
Rotation Mode: The only difference existing between the linear mode and the rotation mode is
that when the pressure reaches a desired value (setpoint) and all of the compressors are off, a rotation
of the compressors will take place, so that the time that they are operational is balanced between them.
Capacity Mode: In this mode of operation, the operating point for each compressor is calculated
according to the capacity thereof (F14~F17).
The number of stages configured in function 12 continues being considered, and for that reason, it
should have the sum of the capacities of the active stages be exactly 100%, the deactivated stages will
be automatically configured as a 0% capacity, and the user will not have permission to alter its value.
The activation of the stages depends on the values of the capacities of each compressor. For example, if
the capacities are 10%, 20%, 30%, 40% for the compressors C1 through C4 respectively, the setpoint
10psi and the hysteresis 10 psi, the operating levels for each compressor will be as follows:
Pressure = 11 (10%) C1
Pressure =12 (20%) C2
Pressure =13 (30%) C3
Pressure =14 (40%) C4
Pressure =15 (50%) C1 + C4
Pressure =16 (60%) C2 + C4
Pressure = 17 (70%) C3 + C4
Pressure =18 (80%) C1 + C3 + C4
Pressure =19 (90%) C2 + C3 +C4
Pressure = 20 (100%) C1 + C2 + C3 + C4
Please note that the capacities of the compressors can be configured in any order, for example: 20%,
40%, 10% and 30% for compressors C1 through C4.
C4
C3
C2
C1
Time
Stages
10%
Time
C1
C1+C4
C2+C4
C3+C4
C1+C3+C4
C2+C3+C4
C1+C2+C3+C4
20%
30%
40%
50%
60%
70%
80%
90%
100%
C2+C3+C4
C1+C3+C4
C3+C4
C2+C4
Demand
Setpoint
C2
C3
C4
Capacity of the compressor/stage 1
Capacity of the compressor/stage 2
Capacity of the compressor/stage 3
Capacity of the compressor/stage 4
Outputs' state when a sensor error is detected
This function defines the capacity in a percentage of stage 1 in relation to the total of the active stages.
This function defines the capacity in a percentage of stage 2 in relation to the total of the active stages.
This function defines the capacity in a percentage of stage 3 in relation to the total of the active stages.
This function defines the capacity in a percentage of stage 4 in relation to the total of the active stages.
Use this function to configure the default state that each of the controler's outputs will assume when a
pressure measurement error occurs. The table below indicates the function value according to each
output state.
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off.
Off
On
On
Off.
Off
On
On
Off.
Off
On
On
Off.
Off
On
On
Off.
Off
Off.
Off
On
On
On
On
Off.
Off
Off.
Off
On
On
On
On
Off.
Off
Off.
Off
Off.
Off
Off.
Off
On
On
On
On
On
On
On
On
Out 1
Function Value
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Out 2
Out 3
Out 4
Minimum time between activation of 2 different stages
Minimum time between deactivation of 2 different stages
Minimum time of stage activated
Minimum time of stage deactivated
Maximum operating time between maintenances on the stage 1
Maximum operating time between maintenances on the stage 2
Maximum operating time between maintenances on the stage 3
This time guarantees that no simultaneous activations will take place, avoiding an overload on the
electrical system.
Minimum time for the deactivation of different stages. This time prevents two or more charges from
being deactivated simultaneously.
Guarantees a minimum time that the charge will be activated.
Time provided to prevent a stage from being activated successively.
Time in dozens of ours that stage 1 should remain functional without maintenance.
Time in dozens of ours that stage 2 should remain functional without maintenance.
Time in dozens of ours that stage 3 should remain functional without maintenance.
Maximum operating time between maintenances on the stage 4
Address of the equipment on the network RS-485 (serial communication)
Time in dozens of ours that stage 4 should remain functional without maintenance.
Address of the equipment on the network for communication with the software SITRAD . Remarks: on
the same network, there should be no equipment that shares the same address.
®
5. FUNCTIONS WITH FACILITATED ACCESS
5.1 - Visualize minimum and maximum pressures
Pressing the key
, you can visualize the minimum and maximum pressures of the pressure gauge. After
pressing the key, the minimum and maximum pressures will be displayed, respectively, followed by the
message
indicating the end of the operation. If the key
remains pressed in, the values will be
reinitialized and the message
will be shown in the display.
5.2 - Display the hours worked
Pressing the key
you can visualize the hours worked for each control stage. After pressing the key, the
message
will appear in the display with the number of the stage. Then the functioning time will be
displayed in multiples of tens of hours (x10h) for the stage in question. This operation will be repeated for the
four stages of the controller, until the message
is displayed, indicating the end of the operation.
