Two modbus master PLC vs HMI - PLCS.net

obsolute · March 14th, 2010, 06:59 AM

I have a Schneider M340 PLC with a modbus processor BMXP342000 and a ethernet NOE110 card. The modbus port is used as Master to communicate with several modbus slave drives and softstarts. My ethernet NOE110 is used to communicate with several schneider OTB's deported IO with IO scanning. Now I have a GEfanuc Quickpanel HMI that I need to hook up to this equipment. Since the HMI is master can I communicate between the quickpanel and the ethernet NOE110 passing through a schneider 174 cev 300 10 bridge?

GeoffC · March 15th, 2010, 01:11 AM

Yes that will work. It is only modbus serial that can have only a single master, that restriction does not apply to the ethernet port

obsolute · March 15th, 2010, 04:43 AM

Thank you!

tragically1969 · March 15th, 2010, 09:58 AM

Quote:

Originally Posted by wassim.daoud

.... it's easier:

Why is it easier to use OPC ?

March 14th, 2010, 06:59 AM	#1
obsolute Member Join Date: Dec 2006 Location: montreal Posts: 4	Two modbus master PLC vs HMI I have a Schneider M340 PLC with a modbus processor BMXP342000 and a ethernet NOE110 card. The modbus port is used as Master to communicate with several modbus slave drives and softstarts. My ethernet NOE110 is used to communicate with several schneider OTB's deported IO with IO scanning. Now I have a GEfanuc Quickpanel HMI that I need to hook up to this equipment. Since the HMI is master can I communicate between the quickpanel and the ethernet NOE110 passing through a schneider 174 cev 300 10 bridge?

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March 15th, 2010, 01:11 AM	#2
GeoffC Member Join Date: Aug 2006 Location: Newcastle Posts: 420	Yes that will work. It is only modbus serial that can have only a single master, that restriction does not apply to the ethernet port

March 15th, 2010, 04:43 AM	#3
obsolute Member Join Date: Dec 2006 Location: montreal Posts: 4	Thank you!

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