Continental Hydraulics Installation Manual
Page 17 of 20
CEM-BPS-B
CHI 1020813 Jan 2016
CTRL (Deceleration characteristics)
Command
Parameters
Unit
Group
CTRL
x
x= LIN|SQRT1|SQRT2
-
STD
The deceleration characteristic is set with this parameter. In case of positively overlapped
proportional valves the SQRT function should be used. The non-linear flow function of these
valves is linearized by the SQRT
2
function.
In case of zero lapped valves (control valves and servo valves) the LIN or SQRT1 function should
be used regardless of the application. The progressive characteristic of the SQRT1 function has
better positioning accuracy but can also lead to longer positioning times in individual cases.
LIN:
Linear deceleration characteristic (gain is increased by a factor of 1).
SQRT1:
Root function for braking curve calculation. The gain is increased by a factor of 3 (in
the target position). This is the default setting.
SQRT2:
Root function for braking curve calculation. The gain is increased by a factor of 5 (in
the target position). This setting should only be used with a significantly progressive
flow through the valve.
2
The SQRT function generates constant deceleration and thus reaches the target position faster. This is
achieved by increasing the gain during the deceleration process.
Figure 2 (Braking function with respect to stroke and time)
Stroke
V
e
lo
ci
ty
Braking stroke
D:A or D:B
CTRL = LIN
CTRL = SQRT
Time
V
e
lo
ci
ty
Deceleration time
D:A or D:B
CTRL = LIN
CTRL = SQRT
