Siemens SIMATIC Manual page 44

Introduction
The sample in this manual takes you through five steps, showing you how to com-
mission a fully functional counter application. You are going to get acquainted with
the basic hardware and software functions and learn how to operate the counting
function.
The references to the manual should give you a first overview of the information it
contains. Additional notes relating to frequency measurement and pulse width mo-
dulation applications are found on the sample project CD.
It should take no more than one or two hours to work through this sample, depen-
ding on experience.
Prerequisites
Conditions are that:
S You have installed an S7-300 station, consisting of a power supply module and
a CPU 31xC.
S STEP 7 (>= V5.1 + Servicepack 2) is correctly installed on your PG.
S The sample projects is available, either on your CD or you have downloaded
them from the Internet.
S You have created a project for the S7-300 station.
S The PG is connected to the CPU.
S You are set up with all accessories required, e.g. front plug and wiring material.
S The CPU is connected correctly to a power supply.
Warning
!
Depending on the field of application, your S7-300 as component in plants and
systems requires special attention relating to specific rules and regulations.
Please pay attention to current regulations relating to safety and accident preven-
tion, e.g. IEC 204 (EMERGENCY–OFF devices).
Serious injury as well as damage to machines and appliances is to be expected if
you neglect these regulations.
2
Automation System S7-300, Getting Started – Counting
A5E00105536-01