Commander Se Analog Output Offset Scaler - Control Techniques Commander SE Advanced User's Manual

12.9

Commander SE analog output offset scaler

Example 1
The Commander SE does not have an offset trim parameter, so in order to achieve this function the drive's internal PID loop
can be used. For this example the analog output on terminal 6 is required to give 0-10V (0-50Hz) when the analog input goes
from 5.5V-10V.
Parameter set up
7.10 = 0
1.28 = 550.0
14.03 = 7.01
14.04 = 1.28
14.10 = 1.00
14.11 = 0
14.12 = 0
14.13 = 45%
14.14 = 0
14.15 = 2.22
14.16 = 1.36
14.08 = 1
Perform a Save routine: xx.00 = 1000 and press red Stop / Reset button on the drive
7.01
14.03
14.04
1.28
5.5V
1000 = 550.0
X
10V
Offset using 1.28
166
Offset using preset speed 8 calculated by:
Required voltage level @ 0Hz / Maximum voltage value of analog output x 1000 (Range of 1.28)
PID reference source assigned to analog input 1
PID feedback source assigned to preset speed 8
PID proportional gain
PID integral gain
PID derivative gain
PID output limited to 45% of total value
PID output can never go negative
Output from the PID is scaled back to the full range of the frequency reference, calculated by:
Max range of 14.15 / 14.13
PID output destination assigned to analog reference 1
Enable PID
Subtractor
14.12 = 0
14.11 = 0
14.10
= 1.00
+
_
Enable
14.08
PID
14.15
100%
= 2.22
45%
Scale back
to full range of
14.10 = 0
frequency
14.13 = 45%
reference
Clamp
Commander SE Advanced User Guide
14.16
= 1.36
Issue Number: 4