adccommunitymod (AutomationDirect) asked a question.
Programing Via RS485
Created Date: October 10,2011
Created By: dieseltwitch
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I'm looking at building my systems with an RS485 - Ethernet Gateway. My question is if I will be able to program both C-More Micros (I know some one will have to the F1+F5) and DL06's by going through the Ethernet Gateway? It would make on site and remote programing a snap if it works, I'm getting sick of constant swapping of cables between the HMI and the PLC to program
Created Date: October 10,2011
Created by: franji1
With serial communications, you can only have one master active at a time. It is possible, but you have to have some mechanical lock out of the networking - not sure how that can work. I would think two physical cables is the best "mechanical " lockout - not sure what else can give you what you want, on a PLC serial port, that is.
This is the power of Ethernet via ECOM modules. You can have 3 HMI masters talking to one ECOM module, along with a PC in an office with a network card configured to be on the "manufacturing " sub-net, and be able to talk to the same PLC with DirectSOFT. The ECOM module tracks all the incoming traffic from all the various "masters " and ensures that the proper requests ' response goes to the proper "master " IP address.
Created Date: October 10,2011
Created by: dieseltwitch
That makes a lot sense, thank you for explaing it. While I do love the ecom module, a lot of the systems I build have 3 RTD cards and a 4 or 8 Chan 0-10VDC output card. So no room left for an ecom with out having to go to field IO. I'm thinking of actually just putting in a embedded pc with two serials ports to solve my remote programing problem
Created Date: October 10,2011
Created by: franji1
Could you use two 06's or a 205 system. You can use modbus serial on Port 2 of each 06. You could make the 2nd 06 have no program other than MWX instruction pushing the I/O across to the 1st 06 that has all the existing logic. Then you can open a slot by moving one of the I/O modules to the 2nd 06.
Main 06 (Modbus Serial Slave) contains all I/O minus one "slower " module (RTD), and an ECOM100 where the RTD module was
Second 06 (Modbus Serial Master) contains the RTD module that was in the other one. All it does is read the temperatures, then uses MWX instruction to write the 4 (or however many) temperatures to the Main 06. You could make this system be an 05, then use WX instead of MWX instruction, but still use Modbus Serial out port 2 of the 05 into port 2 of the Main 06.
Created Date: October 10,2011
Created by: dieseltwitch
I'm looking at building my systems with an RS485 - Ethernet Gateway. My question is if I will be able to program both C-More Micros (I know some one will have to the F1+F5) and DL06's by going through the Ethernet Gateway? It would make on site and remote programing a snap if it works, I'm getting sick of constant swapping of cables between the HMI and the PLC to program