e3
0b
e9
98
.1
1
Set-point
Calculation
External Set-point
Ramp
Droop
Speed
PID
Torque
PID
M2
M3
Drive 2
Drive 3
Set-point
Calculation
Ramp
Droop
Speed
PID
-
Set-point
Calculation
Ramp
Speed
PID
Torque
PID
M1
Drive 1
-
Torque
PID
Illustration 64: Speed Trim
The drawing shows a single-source setup where the master sends the torque signal to all followers. The number of available analog
outputs on the master limits this setup. To overcome the limitation of the number of analog outputs, use a cascade principle. The
cascade principle makes the control slower and less accurate compared with the setup using analog outputs.
4.8.3 7-0* Speed PID Ctrl.
N O T I C E
If separate encoders are used, adjust the ramp-related parameters according to the gear ratio between the 2 encoders.
Parameter 7-00 Speed PID Feedback Source
Table 366: Parameter 7-00 Speed PID Feedback Source
7-00 Speed PID Feedback Source
Default value: Size related
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: False
Option Name
Description
[0]
Motor feedb. P1-02 Use the feedback source selected as motor feedback in
parameter 1-02 Flux Motor Feedback
Source
.
[1]
24V encoder 32/33
Single signal generated from 24 V High Threshold Logic (HTL) encoder connected to terminals 32
and 33. Configure the 24 V encoder interface in
parameter group 5-7* 24V Encoder Input
. Program
terminals 32/33 to
[0] No operation
.
[6]
Analog input 53
AU373327181955en-000101 / 130R1208
190 | Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide