Modbus TCPIP

cornbread · Nov 15, 2013

I'm looking for a cheap way to read modbus TCPIP data into a PLC and fire some outputs (8-10). We bult a unit using a old SLC 500 and a prosoft card and it works great, they are not thrilled with the cost. I would like to keep in on a AB or Siemens platform. Any sugggestions would be greatly appreciated.

dmargineau · Nov 15, 2013

AB Micro830 with a 4-Relay expansion module will give you 10 Relay outputs; it supports ModbusTCP Server connections acting as a "Slave".
http://ab.rockwellautomation.com/Programmable-Controllers/Micro830
http://literature.rockwellautomation.com/idc/groups/literature/documents/um/2080-um002_-en-e.pdf
http://raise.rockwellautomation.com...ents.asp?CID=CAE72F29C0F64C34842140FB85E92287 $ 356.00 List.

Kidblue · Nov 16, 2013

Hi,

Not as cheap as the 830 but the ML1400 Ser B supports Modbus TCP/IP Client/Server. Still far cheaper than an SLC and Prosoft card though!

Rob

iant · Nov 16, 2013

the 830 firmware upgrade to V4 uses CIP
so you could be able to talk directly via tag addresses etc.
before this you needed Modbus to talk to a component HMI.

JRW · Nov 16, 2013

Go with the Siemens S71200, one of the small ones are under $300
They have a starter kit with Plc,software and cable for cheap

Mike_RH · Nov 16, 2013

JRW said:
Go with the Siemens S71200, one of the small ones are under $300
They have a starter kit with Plc,software and cable for cheap

I agree with JRW - the 1200 comes with functions to handle Modbus TCP.

Modbus TCPIP

cornbread

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dmargineau

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Kidblue

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iant

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JRW

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Mike_RH

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