adccommunitymod (AutomationDirect) asked a question.
GS-EDRV 100 Communication with RSLogix 5000
Created Date: June 22,2012
Created By: jefrob4
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I am trying to get a GS serier drive to talk to RSLogix 5000 through the GS-EDRV 100 module. I have the module setup with the ip address and I can see it over the web, but when I create a generic ethernet module in rslogix I cannot get it to communicate. I attached a screen shot of the rslogix screen for setting up communication. I noted three fields that I cannot find information for in the literature for the module. Any help would be appreciated.
Created Date: June 22,2012
Created by: Do-more PE
The GS-EDRV100 can only communicate via MODBUS TCP/IP which is vastly different than Ethernet IP which is used by Allen Bradley equipment.
Some Allen Bradley controllers can talk MODBUS TCP/IP, but I do not have a list of which ones have the capability.
Created Date: June 25,2012
Created by: jefrob4
Gs-edrv 100
I am told that Version 16 and up of rslogix 5000 will talk modbus and we have setup some modbus on our systems, but the gs-edrv 100 talks ethernet ip and then modbus. I am trying to get it to talk to rslogix before i connect it to the gs drive.
Created Date: June 25,2012
Created by: dnj
the GS-EDRV100 only talks Modbus TCP/IP, Ethernet IP is not supported. This is stated in the specifications:
http://www.automationdirect.com/static/specs/gsedrv100.pdf
If version 16 can talk Modbus, does it support both client & server (or master/slave)connections? Since the EDRV100 is a slave device, you will need to set up communications in the AB device to read/write to the EDRV100 the addresses you read out of the drive:
http://www.automationdirect.com/static/manuals/gsedrvm/ch1.pdf
refer to page 27 of the above manaul for Modbus addressing
Created Date: June 25,2012
Created by: dnj
Found this app note on AB website:
http://literature.rockwellautomation.com/idc/groups/literature/documents/ap/cig-ap129_-en-p.pdf
Created Date: June 25,2012
Created by: franji1
Found this app note on AB website: Looks to be serial only (Modbus/RTU), not Modbus/TCP
Created Date: June 26,2012
Created by: jefrob4
Gs-edrv 100
Great comments guys. Thanks for all the input. To address some of the questions given as followup:
"The GS-EDRV100 provides a low cost, high-performance 10/100Mbps Ethernet
link between a control system and a GS Series AC Drive. The control system can
be any of the following:
• DL205 CPU, DL405 CPU, or a WinPLC, with the appropriate Ethernet Remote
Master module (H2-ERM or H4-ERM).
• A Productivity3000 CPU using the onboard Ethernet port.
• A PC running Entivity’s ThinknDo software, a PC using a custom device driver that
was developed using our Ethernet SDK, or a PC running KEPDirect EBC or OPC
Server.
Any independent I/O controller with a Modbus TCP/IP driver. Page 10 of the user manual
According to Allen Bradley, they would qualify to speak to this device. And it says specifically Modbus TCP/IP.
Now a second point on the AB article speaking about Modbus. This is speaking specifically about serial communication from AB to other modbus devices, and not over TCP/IP.
Conclusion, I am still looking for a usable answer to the communication issue.
Created Date: June 26,2012
Created by: dnj
Have you tried just using Modbus Slave, this is a Modbus simulator software, if you can communicate successfully to this, then talking to the EDRV100 is the same thing.
http://www.modbustools.com/modbus_slave.asp
You could also use Modbus Poll, this acts like a Modbus master, if you can successfully talk to the EDRV100, then it is a setup issue on the AB side.
Created Date: June 27,2012
Created by: GKiser
jefrob4, I don't want you to get confused. When the manual says, "Any independent I/O controller with a Modbus TCP/IP driver " it means that any 3rd-party device that has Modbus TCP/IP master capability can talk to the GS-EDRV100 slave. So if your AB Ethernet module can be a Modbus TCP Master device, then it most certainly can talk to the GS-EDRV100 with no problems. The issue becomes only what Modbus addresses you want to read and write to in the GS-drive itself. These are listed in the GS-drive manual.
For example to read P0.00 (Motor Nameplate Voltage) from a GS2, you would read Holding Register 1 (i.e. nomenclature 40001) (pg. 4-11 in my GS2 manual).
Created Date: July 13,2012
Created by: Nucor_Dave
Modbus Master
You can use a Prosoft card (MVI56-MNETR) This is a Modbus Ethernet Master. Prosoft has rslogix program examples. The modbus gateway can be used instead of the GS-EDRV.
Created Date: July 16,2012
Created by: jefrob4
Gs-edrv 100
Thanks for the info. I believe I will just stick with the Powerflex 40's from AB. They are much simplier to configure and not that much more expensive now.