WEG CFW-09, User Manual

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CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Range
[Factory Setting]
Parameter Unit Description / Notes
P241
(1)
0 to 3
Analog Input AI3 [ 0 ]
Function -
(Isolated analog
input on the optional
board EBB.
Refer to chapter 8)
When the option 0 (P221/P222) is selected, AI3 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 AI3. 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 AI3 is set to maximum (P020 = 100 %), the torque limit will be
also maximum - P169/P170 = 180 %.
The option 3 (Process Variable) defines the input AI3 as feedback signal
of the PID Regulator (for instance: pressure, temperature sensor, etc.), if
P524 = 1.
When AI3 is set to its maximum value (P020 = 100 %), the PID process
variable will be on its maximum value (100 %).
Option 4 - Maximum Torque Current (AI3+AI2) :
When parameters P237 = 0 and P241 = 2, the torque current limit (P169
and P170) is given by the signal at the Analog Input AI3.
When parameters P237 = 0 and P241 = 4, the torque current limit (P169
and P170) is given by the sum of the signals at Analog Inputs AI2 and
AI3.
P240 -100.0 to +100.0
Analog Input AI2 [ 0.0 ]
Offset 0.1 %
Refer to P234.
Input AI3 Function
P221/P222
After Ramp Reference
Maximum Torque Current
PID Process Variable
Maximum Torque Current (AI3+AI2)
P241
0
1
2
3
4
When a current signal is used at the Analog Input AI2, set the switch
S1.1 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.
Table 6.37 - AI3 function