Vacon NX Series Applications Manual page 258

VACON · 258
See parameters ID303 and ID304 above.
366 EASY CHANGEOVER 5 (2.2.37)
Use this parameter to select copy reference function.
Table 140: Selections for parameter ID366
Selection
number
0 Keep reference
1 Copy reference
If Copy reference has been selected it is possible to switch from direct control to PID control
and back without scaling the reference and actual value.
For example: The process is driven with direct frequency reference (Control place I/O B,
fieldbus or keypad) to some point and then the control place is switched to one where the PID
controller is selected. The PID control starts to maintain that point.
It is also possible to change the control source back to direct frequency control. In this case,
the output frequency is copied as the frequency reference. If the destination place is Keypad
the run status (Run/Stop, Direction and Reference) will be copied.
The changeover is smooth when the reference of the destination source comes from the
Keypad or an internal motor potentiometer (parameter ID332 [PID Ref.] = 2 or 4, ID343 [I/O B
Ref] = 2 or 4, par. ID121 [Keypad Ref] = 2 or 4 and ID122 [Fieldbus Ref]= 2 or 4.
367 MOTOR POTENTIOMETER MEMORY RESET (FREQUENCY REFERENCE) 3567 (2.2.23, 2.2.28,
2.2.1.3, 2.2.1.16)
Use this parameter to set the logic for the resetting of the frequency reference of the motor
potentiometer.
Table 141: Selections for parameter ID367
Selection
number
0 No reset
Memory reset in stop and pow-
1
erdown
2 Memory reset in powerdown
370 MOTOR POTENTIOMETER MEMORY RESET (PID REFERENCE) 57 (2.2.29, 2.2.1.17)
Use this parameter to set the logic for the resetting of the PID reference of the motor
potentiometer.
9
Selection name
Selection name
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PARAMETER DESCRIPTIONS
Description
Description