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Signal flow plan
Position control loop
Z1
Valve
B1 P opening
8791 CMD + Xd1 E1 K
-
Set-point Position controller Control system Proportional
position value valve
POS
Position measuring system
Position control loop
Schematic diagram of SideControl Type 8791 BASIC
without Fieldbus interface
Input for position Analogue position
setpoint value feedback (optional)
4 - 20mA** Input 4-20mA**, 0-20mA
0-20 mA
Positioner
Binary input BASIC
Output
Supply 24 V PNP NO
24 V DC Initiator 1/Initiator 2
Communications (optional)
interface Opeeration
** Default setting
with AS-interface
Input for Analogue position
set point value feedback
ASi-Bus Inputs via ASi-Bus
communication communication
Positioner
AS-interface
Outputs
Supply 24 V PNP NO
24 V DC Initiator 1/Initiator 2
Communication (optional)
Interface Operation
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