Burkert 8605 KK Instructions De Service page 19

force of the return spring of the valve acts as a closing force.
The zero point cut-off can be optionally activated or deactivated.
A ramp function serves to attenuate sudden changes in the input signal
and to transform them into an adjustable ramp (time constant 0 to 10 s) (see
Illustration 6-6: Ramp function). This is expedient for applications in which
sudden changes in the fluidic controlled variable are undesirable. The ramps
can be set separately for positive and negative jumps.
The frequency of the PWM signal must be adapted to the valve used.
standard signal
current
t
Illustration 6-6: Ramp function Ramp function
The digital communication with superordinate controllers (PCs, etc.) is
possible via RS22 or RS485 interfaces using auxiliary modules (see also
chapter 5.4 Ordering Tables / Accessories).
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