2.4 Feedback and Reference Handling
2.4.1 Reference Handling
Details for Open Loop and Closed Loop operation.
195NA451.10
Speed open
loop
P 1-00
Configuration
mode
Input command:
freeze reference
Process
control
Scale to
Hz
Scale to
process
unit
Remote
reference/
setpoint
±200%
Feedback
handling
P 16-02 Remote
Reference in %
maxRefPCT
minRefPct
min
ref
-max
ref
Freeze
reference &
increase/
decrease
reference
±100%
Input commands:
Speed up/speed down
±200%
Relative
reference
=
X+X*Y/100
±200%
P 16-50 External reference in %
±200%
Parameter choice:
Reference resource 1,2,3
±100%
P 3-10 Preset
reference
Input command:
preset ref bit0, bit1, bit2
+
+
Relative scalling reference
Intern resource
Preset relative
reference
±100%
Preset reference 0 ±100%
Preset reference 1 ±100%
Preset reference 2 ±100%
Preset reference 3 ±100%
Preset reference 4 ±100%
Preset reference 5 ±100%
Preset reference 6 ±100%
Preset reference 7 ±100%
No function
Analog reference
±200%
Local bus reference
±200%
No function
Analog reference
±200%
Pulse reference
±200%
No function
Analog reference
±200%
Local bus reference
±200%
Y
X
P 3-14
P 3-15 Reference 1
resource
P 16-01
Reference
[Unit]
P 3-16 Reference 2
resource
Local bus reference
±200%
P 3-17 Reference 3
resource
Pulse reference
±200%
P 20 - 12
Reference
/Feedback
unit
or rpm
P 4 - 14 Motor
Speed high
limit (Hz)
P 4 - 12 Motor
Speed low
limit (Hz)
Pulse reference
±200%
Illustration 2.11 Block Diagram Showing Remote Reference
The remote reference comprises:
•
Preset references
•
External references (analog inputs and serial
communication bus references)
•
The preset relative reference
•
Feedback controlled setpoint.
Up to 8 preset references can be programmed in the
frequency converter. Select the active preset reference
using digital inputs or the serial communications bus. The
reference can also be supplied externally, most commonly
from an analog input. Select this external source via the 3
Reference Source parameters:
•
3-15 Reference 1 Source
,
•
3-16 Reference 2 Source
, and
•
3-17 Reference 3 Source
Sum all reference resources and the bus reference to
produce the total external reference. The external
reference, the preset reference or the sum of the 2 can be
selected to be the active reference. Finally, this reference
can by be scaled using
3-14 Preset Relative Reference
.
The scaled reference is calculated as follows:
Reference = X + X × Y
100
Product Overview
VLT
®
DriveMotor FCP 106 and FCM 106 Design Guide
14
MG03M102 -
08/2015
2
2
