4.2 Write protection
A microswitch marked "write protection" is
located to the right of the seven bus address
selector switches inside the hinged cover.
When it is activated (position ON), the posi-
tioner settings are write-protected, so that
they cannot be overwritten by the
PROFIBUS communication protocol. If you
want to change the settings via communica-
tion, set the switch to position OFF.
4.3 Activate/deactivate the forced
venting function
For model index .0
3
and higher:
1. Unscrew the four screws from the cover
inside the hinged lid and remove the
cover.
2. Unscrew the central screw on the
board and push the board to one side.
3. Set switch to desired position:
1 ENABLED > Function activated
2 DISABLED > Function deactivated.
4.4 Default setting
All parameters are set to default values. See
chapter 8 on description of parameters.
NOTE
Manual operation and activated
final position functions can cause
the actuator to be filled with the
maximum supply pressure.
Should this lead to impermissible
forces occurring, the supply pressure
must be restricted by a reducing sta-
tion.
Fig. 11
⋅
Inside view of cover plate
GW1
GW2
3785
PE
IEC 1158-2
S
NC
-5
2
+5
1-42
+4
1-86
+85
-82
+81
LED 1
LED 2
1
2
4
8
16
32
64
W
rite protection
Caution! V
alve actuates
Init/Zero
Bus address
1
0
0N
0FF
0
Arrow for
mounting position
Manual adjustment
Zero point lever
Pointer
Adjustment screws GW
Key for initialization
or zero point adjustment
Write protection switch
Metal tags
Bus address
LEDs
EB 8382-1 EN
31
Operation
Summary of Contents for 3785 series
Page 69: ...EB 8382 1 EN 69...
Page 70: ...70 EB 8382 1 EN...
Page 71: ...EB 8382 1 EN 71...
Page 72: ...72 EB 8382 1 EN...
Page 73: ...EB 8382 1 EN 73...
Page 74: ...74 EB 8382 1 EN...
Page 75: ...EB 8382 1 EN 75...
Page 76: ...76 EB 8382 1 EN...
Page 77: ...EB 8382 1 EN 77...
Page 78: ...78 EB 8382 1 EN...
Page 79: ...EB 8382 1 EN 79...
