GE AF-650 GP Programming Manual page 85

Parameter Descriptions
AN-50 Terminal 42 Output
Option:
[131] Reference
4-20mA
3 3
[132] Feedback
4-20mA
[133] Motor cur.
4-20mA
[134] Torq.% lim
4-20 mA
[135] Torq.% nom
4-20mA
[136] Power
4-20mA
[137] Speed
4-20mA
[138] Torque
4-20mA
[139] Bus ctrl.
0-20 mA
[140] Bus ctrl.
4-20 mA
[141] Bus ctrl
0-20mA t.o.
[142] Bus ctrl
4-20mA t.o.
[147] Main act val
0-20mA
[148] Main act val
4-20mA
[149] Torque %
lim 4-20mA
84
Function:
Parameter F-50 Reference Range [Min-Max]
0% = 4 mA; 100% = 20 mA
Parameter F-50 Reference Range [-Max-Max]
-100% = 4 mA; 0% = 12 mA; +100% =
20 mA
Feedback 4-20mA: parameter F-50 Reference
Range [Min-Max] 0% = 4 mA; 100% = 20 mA
Parameter F-50 Reference Range [-Max-Max]
-100% = 4 mA; 0% = 12 mA; +100% = 20
mA
The value is taken from
parameter DR-37 Drive Max. Current. The
inverter maximum current (160% current) is
equal to 20 mA.
Example: Inverter normal current (11 kW) is
24 A. 160% = 38.4 A. Motor normal current
is 22 A, the readout is 11.46 mA.
The torque setting is related to setting in
parameter F-40 Torque Limiter (Driving).
The torque setting is related to the motor
torque setting.
Taken from parameter P-07 Motor Power [kW].
Taken from parameter F-53 Maximum
Reference. 20 mA = Value in
parameter F-53 Maximum Reference.
Torque reference related to 160% torque.
An output value set from Network process
data. The output works independently of
internal functions in the frequency converter.
An output value set from Network process
data. The output works independently of
internal functions in the frequency converter.
Parameter H-74 Warning Reference Low
defines the behavior of the analog output in
case of fieldbus timeout.
Parameter H-74 Warning Reference Low
defines the behavior of the analog output in
case of fieldbus timeout.
Analog output at 0 torque is 12 mA.
Motoring torque increases the output
current to maximum torque limit 20 mA (set
in parameter F-40 Torque Limiter (Driving)).
02/2016 All rights reserved.
AN-50 Terminal 42 Output
Option: Function:
Generating torque decreases the output to
torque limit in generator mode (set in
parameter F-41 Torque Limiter (Braking))
Example: Parameter F-40 Torque Limiter
(Driving) = 200% and parameter F-41 Torque
Limiter (Braking) = 200%. 20 mA = 200%
motoring and 4 mA = 200% generating.
Illustration 3.35 Torque Limit
[150] Max Out Fr 0 Hz = 0 mA, parameter F-03 Max Output
4-20mA Frequency 1 = 20 mA.
AN-51 Terminal 42 Output Min Scale
Range: Function:
0 % [0 - Scale for the minimum output (0 mA or 4 mA)
*
200 %] of the analog signal at terminal 42.
Set the value to be the percentage of the full
range of the variable selected in
parameter AN-50 Terminal 42 Output.
AN-52 Terminal 42 Output Max Scale
Range: Function:
100 [0 - Scale the maximum output of the selected
% 200 %] analog signal at terminal 42. Set the value to the
*
maximum value of the current signal output.
Scale the output to give a current lower than 20
mA at full scale; or 20 mA at an output below
100% of the maximum signal value. If 20 mA is
the required output current at a value 0–100% of
the full-scale output, program the percentage
value in the parameter, that is, 50% = 20 mA. If a
current 4–20 mA is required at maximum output
(100%), calculate the percentage value as follows:
20 mA/desired maximum current x 100 %
20
i . e . 10 mA : x 100 = 200 %
10
Illustration 3.36 Output Max. Scale
DET-618D