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Constantin Climentieff

MrPLC Member

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1
Joined
20 Oct 2008
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24 Oct 2008

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About Constantin Climentieff

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Hi, I am New!

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Country Russia

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Problem with programming MITSUBISHI FR-A540 via RS-485 cable

Constantin Climentieff posted a topic in Mitsubishi

Hi everyone! I need some help in programming MITSUBISHI FR-A540 controller. 1. Controller has a RS-485 connector for FR-PU04 board. Can I use this connecror itself, or I must use FR-A5NR only? 2. Controller has pins marked RDA/RDB/SDA/SDB but my computer has RxD+, RxD-, TxD+, TxD-. What is the correct pinout for RS-485 cable? 3. Hardware is OK: computer port RS-485 works well with loopback, and controller do with his board also. So, I've tried two alternative pinouts for cable. I sent the correct commands into FR-A540, but it kept quiet. What's wrong?
- 23 Oct 2008
- 1 reply

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