Automation and Drives - SCE
4.WRITING A STEP 7 PROGRAM
We are writing the program to be tested in the statement list language (STL), and it only contains two lines.
Here, the frequencies of the MB100 clock memory byte activated in the hardware are to be read out on an output byte.
Assignment list:
MB100 | Clock | Clock memory byte |
AB0 | AB | Display |
A cycle duration/frequency is assigned to each bit of the clock memory byte. Assignment is as follows:
Bit: | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Clock duration (s): | 2 | 1.6 | 1 | 0.8 | 0.5 | 0.4 | 0.2 | 0.1 |
Frequency (Hz): | 0.5 | 0.625 | 1 | 1.25 | 2 | 2.5 | 5 | 10 |
14. In the 'SIMATIC Manager', mark the 'Blocks' folder.( → SIMATIC Manager → Blocks)
Foreword | Notes | Hardware configuration | STEP 7 program | Testing |
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T I A Training Document |
| Page 21 of 25 |
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| Module | |
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| A5 | |
Issue date: 02/2008 |
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| Programming the CPU | |||