How to troubleshoot communication problem on RS-485 network FAQ
■Communication failed with remote I/O modules/units.
■Using the other brand RS-485 converter (not ICP DAS converter).
■Users’ tools or programs sometimes meet communication problem such as failed to read
data or timeout error.
●ICP DAS Remote I/O modules/units need pull high and pull low resistors for stable signal on the RS-485 network. If the impendence does not match with requirement, the signal on RS-485 may become unstable as below. It will cause communication problems.
●Below are some suggestions to solve the problem:
■Use ICP DAS converter: ICP DAS converter comes with pull high and pull low resistors. Itcan stable the communication signal on RS-485 network.
■Add pull high and pull low resistors: Users can add pull high and pull low resistors on RS-485 network for stable communication signal
■Add tM-SG4:
▲tM-SG4 comes with pull high and pull low resistors. It also can stable communication signal on RS-485 network.
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I-7K 、 M-7K 、 I-87K 、 87Pn 、 M-7000 series 、 M-7000 、 I-7000 series 、 I-7000 |
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FAQ |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2014/4/10 |
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Ver.:1.0 |
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7K5-001 |
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261 KB |
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