SODECA VSD/A - Page 16

11
EN
Fire Mode with NC activation signal
1. Verify that the Fire mode signal halts the Fire mode and triggers the start signal (Run). If necessary, use a two
contact relay, one contact Normally Open and the other Normally Closed.
2. Verify that the CO mode signal triggers the CO mode as well as the start signal (Run).If necessary use a two contact
Normally Open relay.
3. When one of the two modes is triggered, the drive will accelerate towards de preset speed according to the normally
open contact table (see section 6.1).
4. When the two modes aren’t active, the drive will start to decelerate and stop, showing in the display
5. The Fire signal disables the protection features so the drive will maintain continuous operation in emergency
conditions. The speed can be forward or reverse depending on the value set in the “Fire Speed” parameter.
AP7. CO2 MODE
This section explains how to configure the “CO” control mode. This mode allows the drive to regulate the speed of the
ventilator depending on the CO
2
level read by a probe.
7.1 PROGRAMMING
Use the next table to change to, or modify, the CO2 mode.
Table “CO
2
”
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 7.2 for the setpoint configuration.
The Fire Mode operation can affect the warranty of the drive and even nullify it. Contact with
SODECA for further information.
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
1.0
%

PI Controller Integral Time
1.0
s

PI Controller Operating Mode
1

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.