Series 90-30 Modbus Communications

csnte14

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Join Date
Dec 2009
Location
Texas
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I have a Series 90-30 PLC with a CPU364. Is it possible to configure the RS232 or the 10BaseT port on the cpu as a Modbus RTU Slave? Also, what is the RS232 port labeled 'Station Manager' used for?


Thanks

Clint
 
The RS232 "Station Manager" port on the CPU364 is for firmware upgrades. It is not user-configurable. None of the 90-30 CPU models with ethernet have a configurable serial port. If you need both ethernet and Modbus slave capabilities you'll need another module. As diat150 mentioned, you can add a CMM311 module which will give you two ports, either of which can be configured as a Modbus slave. If you're not using the ethernet port, you could replace the (obsolete) CPU364 with a CPU363 which has two configurable serial ports.
 
You do not need to configure it, just have your master device send it a recognized request and it will reply. If you have problems, make sure that your CPU has the latest firmware, which can be downloaded at the web site also. According to KB5915 it supports Modbus-TCP/IP slave protocol. http://support.gefanuc.com/support/index?page=kbchannel&id=S:KB5915&actp=search Go to the GE web site and get GFK-1541, it will answer your questions about using it. http://support.gefanuc.com/support/...aging/DOCUMENT/0/DO213/en_US/1.0/gfk1541b.pdf
 
Last edited:
You do not need to configure it, just have your master device send it a recognized request and it will reply. If you have problems, make sure that your CPU has the latest firmware, which can be downloaded at the web site also. According to KB5915 it supports Modbus-TCP/IP slave protocol. http://support.gefanuc.com/support/index?page=kbchannel&id=S:KB5915&actp=search Go to the GE web site and get GFK-1541, it will answer your questions about using it. http://support.gefanuc.com/support/...aging/DOCUMENT/0/DO213/en_US/1.0/gfk1541b.pdf

That's right. And you can use EGD.
 

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