7.10 Process controller
The process controller function enables a measured process variable to be
controlled via a PI controller to a reference (setpoint) value.
7.10.1 Features
Process controller calculation in speed controller cycle
Process controller as PI controller with Kp adaptation
Process controller actual value selectable via selector
Filtering and offset correct of reference and actual values
Process controller output can be connected to different points in the general
control structure
Process controller is usable in all control modes
Cycle time: 125 µs (if the switching frequency is 4 kHz: 250 µs)
The process controller state is changed with a control word
The process controller state is indicated with a status word
The process controller’s integral term can be reduced in a targeted manner
with a control command
MOOG
ID
No.:
CB40859-001
Date:
02/2018
MSD Servo Drive - Device Help
154
7 Control
7.10.2 Description of control structure
Fig. 7.41: Schematic of process controller
7.10.2.1 Control and status word of process controller
The process controller can be activated either with the control word, P 2681[0] -
CON_PRC_CtrlWord, or directly via a digital input (for more information on how
to select a function for the digital inputs, see Section "Digital Inputs" on page
2
32
, "START_PRC(48) = Start process controller” setting).
Bit
Name
Description
0
On
Enabling the process controller
1
Reset
Resets the integral term with a ramp
(
P 2680[1]
)
Table 7.
32
: Control word
P 2681[0]
