NetNathan
Lifetime Supporting Member
In the Controllogix system I am doing for a vacuum furnace.....
I have 2 devices that only have RS232 for communications and 1 that is only Modbus RTU on RS485.
I am planning on buying (2) RS232 to RS485 serial converters for the RS232 devices so I can have all devices talking RS485 on 1 line.
Don't want to sound too dumb here, but I have never done Modbus RTU only Modbus TCP.
Will I have an issue with the Modbus communication to the RS485 device? If I talk ASCII to the other devices will i be able to talk Modbus RTU to the other device?
Now to talk Controllogix to serial RS485 and/or Modbus RTU.
The 1734 RS485 Point IO module I was going to use, I now find is for Devicenet only and will not talk ASCII.
Any Ideas....I am using Ethernet/IP between all my Controllogix devices, VFD, and 1734 Point IO racks, so that is my preferred method of comms.
Should I just go to Anybus and get an Ethernet/IP to ASCII gateway?
I heard Anybus makes good products.
Has anybody used *******'s "Devicemaster UP" gateway?
http://www.*******.com/pub/en/ethernet-ip-to-serial-device-communications
Maybe someone has a better idea?
I have 2 devices that only have RS232 for communications and 1 that is only Modbus RTU on RS485.
I am planning on buying (2) RS232 to RS485 serial converters for the RS232 devices so I can have all devices talking RS485 on 1 line.
Don't want to sound too dumb here, but I have never done Modbus RTU only Modbus TCP.
Will I have an issue with the Modbus communication to the RS485 device? If I talk ASCII to the other devices will i be able to talk Modbus RTU to the other device?
Now to talk Controllogix to serial RS485 and/or Modbus RTU.
The 1734 RS485 Point IO module I was going to use, I now find is for Devicenet only and will not talk ASCII.
Any Ideas....I am using Ethernet/IP between all my Controllogix devices, VFD, and 1734 Point IO racks, so that is my preferred method of comms.
Should I just go to Anybus and get an Ethernet/IP to ASCII gateway?
I heard Anybus makes good products.
Has anybody used *******'s "Devicemaster UP" gateway?
http://www.*******.com/pub/en/ethernet-ip-to-serial-device-communications
Maybe someone has a better idea?
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