Parker Compax3 Fluid T40

Parker EME
Motion control
192-121102 N04 June 2008 203
5.8 Adjust force / pressure (C3_PressureForceAbsolute)
FB name C3_PressureForceAbsolute
Control absolute force or differential pressure (depending on the physical system selected in the
configuration (see page 46).
Differential pressure:
BAB
A
B
A
A
BA
ppp
A
A
p
A
FF
⋅−=⋅−=
−
α
Force:
BA
FFF −=
VAR_IN_OUT
Axis
INT Axis ID (Library constants)
AXIS_REF_LocalAxis: Main axis
AXIS_REF_LocalAxisAux: Auxiliary axis
VAR_INPUT
Execute
BOOL
Starts the sequences of the module with positive
edge
PressureForce
DINT
Setpoint differential pressure [mbar, psi] or setpoint
force [N].
Gradient
DINT
Change speed for pressure or force in [bar/s, psi/s],
[N/s].
VAR_OUTPUT
Done
BOOL
Specified setpoint value on the setpoint output is
reached
CommandAborted
BOOL Command aborted
Error
BOOL Error while executing module
Note:
 the axis must be in controlled operation, so that the module becomes active.
 After termination of the module, the axis continues to control the differential pressure
or the force.
 Executing a MC_Stop module causes the transition to position control. The current
speed of the axis is controlled down to zero and the position reached then is kept with
the aid of the position controller.
 The execution of the C3_PressureForceStop is required, if no position control is
configured. It causes the gradient to be reduced to zero and the axis to remain force
or pressure controlled.
Execute : BOOL
PressureForce : DINT
Gradient : DINT
Axis : INT
C3_PressureForceAbsolute
Done : BOOL
CommandAborted : BOOL
Error : BOOL