Ethernet Communication Module
Explanations:
•The data exchange will be executed every one second.
•Write “0” into CR#28, and PLC_B will use CR#25 ~ CR#26 as the IP address of the destination PLC.
•Write the IP address of PLC_A into CR#25 and CR#26. The first two IP codes (192.168 = H’C0A8) should be written into CR#26, and the last two IP codes (0.4 = H’0004) into CR#25.
•Write the data in RTC into CR#29 ~ CR#35.
•Write “1” into CR#13 to start the data exchange.
•CR#14 = 2 refers to successful execution. CR#14 = 3 refers to failed execution.
2.Compile the ladder diagram for PLC_A and download it to PLC_A.
M1013 |
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FROM | K100 | K49 | D0 | K7 |
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Explanations: |
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•The received data are stored in CR#49 ~ CR#55.
•The data received every one second are written into D0 ~ D6.
6.11Application of Data Exchange (3)
Writing the time in RTC in PLC_B directly into D0 ~ D6 of PLC_A without writing in ladder diagram into PLC_A.
(1) Adopting static IP.
(2) IP of PLC_A: 192.168.0.4
(3)IP of PLC_B: 192.168.0.5
(4)Update from PLC_B to PLC_A.
1.See 6.1 for how to set up communication.
2.Compile the ladder diagram in the MPU and download it to PLC_B. We do not need to write any corresponding ladder diagram into PLC_A.
M1000 |
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M1013 | M2 | M1 |
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| SET | M1 |
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M1 |
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| TOP | K100 | K28 | K0 | K1 | |||
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| TOP | K100 | K26 | HC0A8 | K1 |
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| TOP | K100 | K25 | H4 | K1 |
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| TOP | K100 | K81 | H1000 | K1 |
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| TOP | K100 | K84 | H1000 | K1 |
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| TOP | K100 | K85 | K7 | K1 |
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48 |
