Rockwell Automation 1746-BLM Blow Molding Module Installation Instructions - Manual (Page 5)

Blow-molding Module 5
Publication 1746-IN014B-EN-P - January 2001
Overview
The module performs its servo control task independently, but is dependent on the
SLC processor for all of its configuration and run-time information. The processor
may be also be used to supply process data or timing information over the
backplane in certain situations (e.g. parison drop synchronization on continuous
extrusion machines, or accumulator position in reciprocating screw machines).
The module uses a digital signal processor running a
Proportional-Integral-Derivative (PID) algorithm to control four axes of motion.
Four analog inputs and four analog outputs are used for process variables and
signals, while four digital inputs and four digital outputs are used for start-of-drop
synchronization and profile step synchronization signals, respectively. An excitation
voltage is provided for use with linear potentiometers.
Digital
I/O
Analog
I/O
Excita-
tion
PLC Interface
Shared Memory
Module
µ
P
Local Memory