Page 30 Instruction manual Parker X-Flow FM-1407 Rev - 11/2021
The picture below shows the basic controller diagram of the X-Flow™. It consists of a standard PID
controller with a number of add-ons.
Basically, when a faster or slower controller response is needed, only the controller gain Kspeed or Kp
has to be changed.
Kp (PIDKp)
Type
Access Range
FlowDDE Flowbus® Modbus® PDU
Float
RW
0…1E+10 167
114/21
0xF2A8..0xF2A9/62121..62122
Proportional action of the PID controller.
Kspeed
Type
Access Range
FlowDDE Flowbus® Modbus® PDU
Float
RW
0…1E+10 254
114/1
0xF2F0..0xF2F1/62193..62194
Ti (PIDTi)
Type
Access Range
FlowDDE Flowbus® Modbus® PDU
Float
RW
0…1E+10 168
114/22
0xF2B0..0xF2B1/62129..62130
Integration action in seconds of the PID controller.
The value should not be changed.
Td (PIDTd)
Type
Access Range
FlowDDE Flowbus® Modbus® PDU
Float
RW
0…1E+10 169
114/23
0xF2B8..0xF2B9/62137..62138
Differentiation action in seconds of the PID controller.
Default Value: 0.0
This value should not be changed.
Kopen (RespOpen0)
Type
Access Range FlowDDE Flowbus® Modbus® PDU
Unsigned char
RW
0…255 165
114/18
0x0E52/3667
Controller response when starting-up from 0% (when valve opens).
Value 128 is default and means: no correction.
Otherwise controller speed will be adjusted as follows:
(128-RespOpen0)
New response = old response * 1.05
∫
d
dt
+
K
speed
S
+
-
Curve
Corr.
Sensor
Control Valve
Flow
Setpoint
K
p
K
open
K
normal
K
stable
P
I
D
Summary of Contents for X-Flow FM-1407
Page 1: ...11 FM 1407...
