SODECA VSD/A - Page 20

15
EN
AP9. PRESSURE CONTROL MODE – VSD1-P, VSD3-P
This section explains how to configure the “PRESSURE CONTROL” control mode. This mode allows the drive to
regulate the speed of the ventilator depending on the overpressure between to places.
9.1 PROGRAMMING
Use the next table to change to, or modify the pressure control mode.
Table “PRESSURE CONTROL”
1. In order to make the regulation more dynamic, change the o parameters. Increase until the output
is fast enough. The increase as much as possible and stop before the system oscillates.
2. See section 9.2 for the setpoint configuration.
9.2 PRESSURE SETPOINT ADJUSTMENT
The pressure setpoint is adjusted in the parameter. The value read by the drive is shown in the only-read
parameter, if the probe has a display the user will be able to see the value directly. This parameters are shown
as percentages and will translate to a different value of Pa, subject to the chosen scale of the probe.
Scale
Pressure in Pa
for every 10% of the Setpoint
Scale
Pressure in Pa
for every 10% of the Setpoint
±100 Pa
20 Pa*
0-1000 Pa
100 Pa
0-100 Pa
10 Pa
0-1500 Pa
150 Pa
0-250 Pa
25 Pa
0-2000 Pa
200 Pa
0-500 Pa
50 Pa
0-2500 Pa
250 Pa
(*)Increase for every 10%, subtract 100 Pa to obtain the real value
Parameter
Description
Adjustment
Units

Maximum Frequency
50.0
Hz

Minimum Frequency
20.0
Hz

Acceleration Ramp Time
10
s

Deceleration Ramp Time
10
s

Motor Rated Current
x.x
A

Primary Command Source
5

Extended Menu Access code
101

Analog Input 1 Signal format
U 0-10
V

PI Controller Proportional Gain
0.2
%

PI Controller Integral Time
3.0
s

PI Controller Operating Mode
0

PI Reference (Setpoint) Source Select
0

PI Digital Setpoint
xx.x
%

PI Feedback Source Select
1
ATTENTION: If there’s a power loss while the ventilator is working and the RUN switch is closed,
the drive will enter the stop stage and show  on the display. Once the power is restored, if
the RUN switch is still closed, the drive will maintain the stop status. In order to start again, the
RUN switch must be opened and closed again. This operation can be modified setting the 
mode in the  parameter.