TMC 188/40 Motion Control Module
Overview
Delta Computer Systems, Inc. 360/254-8688
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Overview
The TMC 188/40 family of Motion Control Modules provides a complete four-axis position control
subsystem for the Siemens SIMATIC TI505 system. The module controls the axes by providing a
complete PID loop plus many additional functions, such as on-the-fly coordinated moves and position
changes. In its standard configuration the module provides four optically isolated magnetostrictive
interfaces and four optically isolated outputs, each individually configurable for voltage or current
mode. A variety of output configurations work with electric servo motors and hydraulic valves. With
the Quadrature and Analog options installed, you can control position using either quadrature
encoders, analog slide potentiometers, or pressure.
The TMC 188/40 Motion Control Module (MCM) occupies one slot of the SIMATIC TI505 rack (two
slots if the Analog or Quadrature options are installed). A Special Function Interface Chip (SFIC)
communicates between the SIMATIC TI505 programmable controller (P/C) and the TMC 188/40. The
TMC 188/40 is programmed using V Memory and eight SFIC WY registers. The on-board 80C188
processor relieves the P/C of the overhead usually associated with servo control. The MCM updates
the actual position and drive output every two milliseconds, assuring accurate positioning even at
high speed.
If you need more than four axes of control you can install additional TMC 188/40 modules.
TMC 188/40 System Block Diagram
NOTE:
Increase in P/C scan times (per module installed) when using the TMC 188/40 are:
525
10 ms per module (not including P/C or remote overhead)
535
1.6 ms
545
0.8 ms
If the TMC 188/40 is used on a remote base, the P/C scan time will degrade considerably.
