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Logic Machine Forum › LogicMachine eco-system › Gateway v
Modbus profiles examples

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Modbus profiles examples
Daniel Offline
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#101
15.04.2025, 12:48
Is the GND connected between devices?
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nhemtman Offline
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#102
28.04.2025, 05:48
(15.04.2025, 12:48)Daniel Wrote: Is the GND connected between devices?

Hi,


The Modbus master device does not have a GND connection (see attachment ECP202EXP.PNG).

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Daniel Offline
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#103
28.04.2025, 07:20
Check all suggestions from this thread
https://forum.logicmachine.net/showthrea...2#pid38562
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admin Offline
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#104
28.04.2025, 12:12
It's possible that INP-GND or PROBE-G can be used. Power down the unit and check resistance between INP-GND and PROBE-G. Most likely inputs are not isolated and resistance should be close to 0. Then check the resistance between RS485-A and INP-GND / RS485-B and INP-GND. Report the values that you get.
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