Watson-Marlow MM440 - Manual (Page 173)

Issue 10/06 3 Functions
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0 173
Example: Command source via "USS on BOP link" interface
a) Standard method → P0700 = 4
b) BICO method → P1055 = 2032.8
P1056 = 2032.9
::::
(refer to P0700 for a complete list)
3.11 PID controller (technological controller)
Parameter range: P2200
P2201 – P2355
Warnings -
Faults -
Function chart number:
FP3300, FP3400, FP5100
Features:
- cycle time:
8 ms
In addition to the open-loop/closed-loop control of a three-phase motor (standard
application for a frequency inverter), MICROMASTER has a technology controller.
This can be used to control process quantities – such as pressure or level.
Depending on the application, different control structures are required to control
process quantities. For MICROMASTER, the following structures have been
integrated; these can be selected or de-selected using parameters P2200, P2251
(also refer to Fig. 3-53):
a) Variable-speed drive (VSD)
b) Closed-loop PID control
c) Closed-loop dancer roll control
The PID controller – integrated in MICROMASTER – is required for control
structures b) and c). The frequency inverter can address many new applications
using the higher-level control (closed-loop PID/dancer roll control). The following
typical applications can be implemented:
¾
Closed-loop pressure control for extruders
¾ Closed-loop water level control for pump drives
¾ Closed-loop temperature control for fan drives
¾ Closed-loop dancer roll position control for winder applications
¾ And similar control tasks