11-1
S7-200 Programmable Controller System Manual
A5E00066097-02
Using USS Protocol Instructions to
Communicate with Drives
This chapter describes the standard USS Protocol instructions that allow the
S7-200 to control a MicroMaster drive. USS Protocol instructions are a feature of
STEP 7-Micro/WIN 32 Toolbox.
STEP 7-Micro/WIN 32 Toolbox makes controlling MicroMaster drives easier by
including preconfigured subroutines and interrupt routines that are specifically
designed for USS Protocol communication. These routines appear as instructions
in the Libraries folder of the STEP 7-Micro/WIN instruction tree. With these new
instructions, you can control the physical drive and the read/write drive parameters
When you select a USS Protocol instruction, one or more associated subroutines
(USS1 through USS7) are added automatically. You do not need to pay attention to
these subroutines.
Chapter Overview
Section Description Page
11.1 USS Protocol Instruction Requirements 11-2
11.2 Programming Sequence 11-4
11.3 USS Protocol Instructions 11-5
11.4 Connecting the Drives 11-17
11.5 Drive Setup 11-18
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