Parker EME
Motion control
192-121102 N04 June 2008 297
SwitchOn: Switching-on position
SwitchOn*: switching-on position corrected by the hysteresis
SwitchOff: Switching-off position
SwitchOff*: switching-off position corrected by the hysteresis
The hysteresis is preset as a position value.
The hysteresis influences the switching-on and switching-off anticipation
You should therefore set this value at the lowest possible level.
5.11.6. CoDeSys-Project for the configuration of the cams
You will find a CoDeSys project for the configuration of the cams with the following
functions on the Compax3 CD under
..\Examples\CamSwitch\CamSwitch_Template.pro:
Configuration of the cam switching mechanism via IEC61131-3 in ST (structured
text):
1.) Initializing some "example cams" (Module "Init_Cam_Switch")
Configuration of sequential cams,
Configuration of fast cams,
Configuration of the hystereses,
Activation of (fast) cams,
Resetting outputs,
Triggering selective VP
Global variables determine, which functions are used or are relevant:
CAMsourceActual - True: Actual position is used as master source
CAMfast - True: fast cams are being used
CAMnumber_per_cycle - 1..4: Number of cams implemented/500µs)
2.) Use of the cams in the IEC (Module "PLC_PRG")
Execute module "Init_Cam_Switch" once,
logic query with cams,
logic combination with cams,
Output of cams via digital outputs,
Deactivating individual cams,
Manupulating deactivated cams
Please observe:
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