WEG CFW-09 User Manual page 164

[Factory Setting]
Parameter
(1)
P235
Analog Input AI1
Signal
P236 -100.0 to +100.0
Analog Input AI1
Offset
(1)(8)
P237
Analog Input AI2
Function
Range
Unit Description / Notes
0 to 3
P235
[ 0 ]
-
When a current signal is used at the Analog Input AI1, set the S1.2
switch on the control board to "ON".
Options 2 and 3 provide an inverse reference with which is possible to
have maximum speed with minimum reference.
Refer to P234.
[ 0.0 ]
0.1 %
0 to 3
[ 0 ]
-
When the option 0 (P221/P222) is selected, AI2 may supply the speed
reference (if set to do so at P221/P222), which is subject to the speed
limits (P133, P134) and the acceleration/deceleration ramps (P100 to
P103). Refer to figure 6.26.
The option 1 (After Ramp Reference, valid only for P202 = 3 and 4) is
generally used as an additional reference signal, for instance, in
applications with a dancer. Refer to figure 6.25. It bypasses the accel/
decel ramp.
The option 2 (Maximum Torque Current) permits controlling the torque
current limit P169, P170 through the analog input AI2. In this case P169,
P170 will be Read Only Parameters. Refer to figure 6.26 a). For this type
of control, check if P160 should be equal to one or zero.
When AI2 is set to maximum (P019 = 100 %), the torque limit will be
also maximum - P169/P170 = 180 %.
The option 3 (PID Process Variable) defines the input AI2 as feedback
signal of the PID regulator (for instance: pressure, temperature sensor,
etc.), if P524 = 0.
When AI2 is set to its maximum value (P019 = 100 %), the PID process
variable will be on its maximum value (100 %).
CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Input AI1 Signal
(0 to 10) V / (0 to 20) mA
0
(4 to 20) mA
1
2 (10 to 0) V / (20 to 0) mA
(20 to 4) mA
3
Table 6.34 - AI1 signal selection
P237
0
After Ramp Reference
1
2 Maximum Torque Current
PID Process Variable
3
4 Maximum Torque Current (AI2+AI1)
Table 6.35 - AI2 function
Switch S1.2
OFF/ON
ON
OFF/ON
ON
Input AI2 Function
P221/P222
165