Position counter

This function counts the number of motor revolutions. The current counter content (actual position) can be output as process data value via network to implement a simple position control in a higher-level Controller.
 
Preconditions
–
The number of motor revolutions is reconstructed from the motor model. For this purpose, the motor control type "Sensorless control (SL PSM) [3]" must be selected and set in 0x2C00 (P300.00). Sensorless control for synchronous motor (SL-PSM) 
 
–
The position control must be implemented in the Controller.
 
 
Details
The signal source for the position counter is selected in 0x2C49:001 (P711.01). The position counter can count forwards and backwards. The current counter content (actual position) is displayed in 0x2C49:003 (P711.03). After the maximum or minimum value has been reached, an overflow takes place.
Reset position counter:
–
The position counter is reset when the supply voltage is switched on.
 
–
The position counter can be reset manually via the "Set position counter" 0x2631:054 (P400.54) function or the NetWordIN1 0x4008:001 (P590.01) data word. For a reset via NetWordIN1, the "Position counter reset [54]" function must be assigned to a bit of the data word. Depending on the selection in 0x2C49:002 (P711.02), the reset can be made either edge-controlled or status-controlled.
 
 
Parameter
Address
Name / setting range / [default setting]
Information
0x2631:054
(P400.54)
Function list: Set position counter
(Function list: Set pos counter)
–
From version 03.00
 
–
Further possible settings: Trigger list 
 
Assignment of a trigger for the "Set position counter" function.
Trigger = FALSE-TRUE edge: Reset position counter manually.
Trigger = FALSE: no action.
Notes:
–
In 0x2C49:002 (P711.02) it can be selected whether the reset is to be effected edge-controlled (default setting) or status-controlled.
 
0
Not connected
No trigger assigned (trigger is constantly FALSE).
0x2C49:001
(P711.01)
Position counter: Signal source
(Position counter: Signal source)
–
From version 03.00
 
Selection of the signal source for the position counter.
0
Disabled
Position counter is deactivated.
5
Internal motor model
The motor revolutions reconstructed from the internal motor model of the sensorless control (SL PSM) are counted.
–
The counter content will not be updated if the power section is switched off.
 
–
After restarting the power section, the counting of the last counter content is continued.
 
0x2C49:002
(P711.02)
Position counter: Set position
(Position counter: Set position)
–
From version 03.00
 
Selection if the manual reset of the position counter is to be effected edge-controlled or status-controlled.
0
By rising edge
1
By signal state TRUE
0x2C49:003
(P711.03)
Position counter: Actual position
(Position counter: Actual position)
–
Read only
 
–
From version 03.00
 
Mappable parameter for providing the current counter content (actual position) via network.
Scaling (applies to every measuring method or encoder resolution):
–
Upper 16 bits: Counted revolutions (0 ... 65535, overflow possible)
 
–
Lower 16 bits: Current position within the revolution (0 ... 65535)