15.04.2025, 12:48 
		
	
	
		Is the GND connected between devices?
	
	
	
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					Modbus profiles examples
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		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). 
		
		
		28.04.2025, 07:20 
		
	 
		Check all suggestions from this thread https://forum.logicmachine.net/showthrea...2#pid38562 
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		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.
	 
		
		
		22.05.2025, 20:05 
		
	 
		
		
		23.05.2025, 06:28 
		
	 
		See the attached profile. It's not tested so some modifications might be needed. Use Modbus profiler app for this: https://forum.logicmachine.net/showthread.php?tid=5911
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