Continental Hydraulics Installation Manual
Page 16 of 20
CEM-BPS-B
CHI 1020813 Jan 2016
D:A / D:B (Deceleration / braking distance)
Command
Parameters
Unit
Group
D:i x
i= A / B
x= 1… 10000
mm
STD
This parameter is specified in mm
1
.
The deceleration stroke is set for each direction of movement (A or B). The control gain is
calculated internally depending on the deceleration distance. The shorter the deceleration
distance, the higher the gain. A longer deceleration distance should be specified in the event of
instability.
i
Intern
D
STROKE
G
Calculation of control gain
CAUTION:
If the maximum stroke (SYS_RANGE command) is changed, the deceleration
distance must also be adjusted. Otherwise this can result in instability and uncontrolled
movements.
PT1 (Timing of the controller)
Command
Parameters
Unit
Group
PT1
x
x= 0
… 300
ms
EXP
This parameter can be used to change the internal timing of the control function. Hydraulic drives
are offten critical to control, especially in case of high speeds and very fast valves. The PT1 filter
can be used to improve the dampening rate and allow for higher loop gains.
Requirement for the use are: The natural frequency of the valve should be equal or higher than
the natural frequency of the drive.
1
CAUTION!
In older modules this parameter was specified in % of the maximum stroke. Since data
specification for this module has now been converted to mm, the relationship between the stroke
(SYS_RANGE command) and these parameters must be taken into account.
