Page 746 - Softbound_Edition_19_en

t
Xi
w
t x SD7 P x P Xi P SD7 P Xi w SD7 w Q Q Q Xi SD7 w
Xi P Q Xi SD7 w
V
Xi
P
SD7 w Xi Digital controller module SD7 P
Digital controller modul
w SD7
Controller mode «Speed control (2-sol)» SD7 Controller mode «2-point controller (2-sol)»
Control of a 2-solenoid spool, throttle or flow control valve in closed Control of a 2-solenoid valve with switching solenoid or of two 1
w
control circuit (with feedback value signal). Two solenoids can be solenoid valves with switching solenoid in closed control circuit (with P
controlled with it. feedback value signal). Two solenoids can be controlled with it. Xi
P
P
V SD7
Xi
P
Xi
w P w
w
P Xi t
SD7 Xi
SD7
P SD7 w SD7
Xi
x Q w SD7 P
Xi
t
Xi P Q Xi SD7 w
w
SD7
Controller mode «2-point controller (1-sol)» Controller mode «3-point controller (2-sol)»
SD7 Control of a 1-solenoid valve with switching solenoid in closed Control of a 2-solenoid valve with switching solenoid or of two
control circuit (with feedback value signal). Only one solenoid can be 1-solenoid valves with switching solenoid in closed control circuit w
controlled with it (corresponds to the solenoid driver 1). (with feedback value signal). Two solenoids can be controlled with it.
w
w Xi t
Xi
P
SD7
P P
SD7 Xi SD7 w
V x Q
Xi
P
Xi
w w P t Xi Q SD7
Xi w
SD7
SD7 SD7
w P
Xi
w
P
SD7
Valve type Signal recording P
The operating mode is set here for the open loop controller modes. It The SD7 controller module has a signal recording function. This, by
V
w
is also possible to select whether proportional or switching solenoids means of PASO, enables the recording of various system signals, such
Xi
w are to be controlled. as command value, solenoid currents, etc., which can be represented
P
Xi t on a common time axis. w Xi P
Xi
Solenoid driver
SD7 Two Pulse-Width-Modulated current outputs are available. To each out- Optimisation of characteristic curve
SD7
put, a dither signal is superimposed, whereas dither frequency and A characteristic curve adjustable per solenoid «Command value input
SD7
SD7
dither level can be adjusted separately. For each output, the minimum – solenoid current output» enables an optimised (e.g., linearised) char-
(Imin) and maximum (Imax) current can be adjusted separately. The acteristic of the hydraulic system. w
solenoid outputs can also be configured as switching outputs. There- P Xi
w
with for each output a power reduction can be adjusted separately.
P
SD7
w
w
Xi t
Xi
SD7
Command value SD7
Analogue value
w
Changing over between the two solenoids
by means of the selected digital input

Wandfluh AG Tel. +41 33 672 72 72 sales@wandfluh.com Illustrations not obligatory Data sheet no.
Postfach Fax +41 33 672 72 12 www.wandfluh.com Data subject to change 1.13-106E 6/11
CH-3714 Frutigen Edition 23 02
Page 746