Reference Handling; References - Danfoss VLT AutomationDrive FC 301 Design Manual

Basic Operating Principles
Active Reference and Configuration Mode
The active reference can be either the local reference or
the remote reference.
3 3
In 3-13 Reference Site, the local reference can be
permanently selected by selecting [2] Local.
To permanently select the remote reference select [1]
Remote. By selecting [0] Linked to Hand/Auto (default) the
reference site depends on which mode is active. (Hand
mode or Auto mode).
Remote
reference
Auto mode
Hand mode
Local
reference
Illustration 3.11 Active Reference
P 1-05
Local
con guration
mode
Local
reference
Illustration 3.12 Configuration Mode
28
VLT
Remote
Linked to hand/auto
Local
P 3-13
LCP Hand on,
Reference site
o and auto
on keys
P 1-00
Con guration
mode
Speed open/
closed loop
Scale to
RPM or
Hz
Torque
Scale to
Nm
Scale to
process
unit
Process
closed loop
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
[Hand On] [Auto on]
Keys
Hand
Hand ⇒ Off
Auto
Auto ⇒ Off
All keys
All keys
Table 3.6 Conditions for Local/Remote Reference Activation
1-00 Configuration Mode determines what kind of
application control principle (i.e. Speed, Torque or Process
Control) is used when the remote reference is active.
Reference
1-05 Local Mode Configuration determines the kind of
application control principle that is used when the local
reference is active. One of them is always active, but both
cannot be active at the same time.

3.7 Reference Handling

3.7.1 References

Analog Reference
An analog signal applied to input 53 or 54. The signal can
be either voltage 0-10 V (FC 301 and FC 302) or -10 to +10
V (FC 302). Current signal 0-20 mA or 4-20 mA.
Binary Reference
A signal applied to the serial communication port (RS-485
terminals 68–69).
Preset Reference
A defined preset reference to be set from -100% to +100%
of the reference range. Selection of 8 preset references via
the digital terminals.
Pulse Reference
A pulse reference applied to terminal 29 or 33, selected in
Local
5-13 Terminal 29 Digital Input or 5-15 Terminal 33 Digital
ref.
Input [32] Pulse time based. Scaling in parameter group 5-5*
Pulse input.
Ref
MAX
Determines the relationship between the reference input
at 100% full scale value (typically 10 V, 20 mA) and the
resulting reference. The maximum reference value set in
3-03 Maximum Reference.
Ref
MIN
Determines the relationship between the reference input
at 0% value (typically 0 V, 0 mA, 4 mA) and the resulting
reference. The minimum reference value set in
3-02 Minimum Reference.
MG33BF02 - Rev. 2013-12-20
3-13 Reference Active Reference
Site
Linked to Hand/ Local
Auto
Linked to Hand/ Local
Auto
Linked to Hand/ Remote
Auto
Linked to Hand/ Remote
Auto
Local Local
Remote Remote