It is currently Fri Aug 01, 2014 3:52 am




Post new topic Reply to topic  [ 9 posts ] 
 Ignition and PowerLogic EGX100 through modbus RTU 
Author Message
General
General

Joined: Tue Jul 26, 2011 2:34 am
Posts: 160
Post Ignition and PowerLogic EGX100 through modbus RTU
Ignition is connected to a gateway PowerLogix EGX100 using modbus RTU. This gateway is connected to a PowerLogix PM710 device. The gateway can be configured through a webpage and is possible visualizing data (comming from the device) from the same webpage. The problem is not showing I can't see the data from the device. Why is this happening?


Wed Jun 27, 2012 6:27 am
Profile
Moderator
Moderator

Joined: Mon Oct 27, 2008 4:10 pm
Posts: 1987
Location: Folsom, CA
Post Re: Ignition and PowerLogic EGX100 through modbus RTU
Have you subscribed to any tags on the device? Modbus doesn't support browsing. You need to either create SQLTags manually, or specify some ranges of tags in the address configuration for that device and then subscribe to them.

_________________
Kevin Herron
Software Developer
Inductive Automation


Wed Jun 27, 2012 6:29 am
Profile WWW
General
General

Joined: Tue Jul 26, 2011 2:34 am
Posts: 160
Post Re: Ignition and PowerLogic EGX100 through modbus RTU
I have specified ranges in the address configuration. When I try to visualize those tags in the quick client I just can see:

Status: OPC_NOT_CONNECTED
Value: null
Quality: Not Connected


Thu Jun 28, 2012 5:22 am
Profile
Moderator
Moderator

Joined: Mon Oct 27, 2008 4:10 pm
Posts: 1987
Location: Folsom, CA
Post Re: Ignition and PowerLogic EGX100 through modbus RTU
You're probably specifying too large a range then. A lot of devices will "freak out" and close the connection if you address registers that don't exist or aren't being used.

Try addressing one register you know exists and has a valid value, manually, by creating a SQLTag.

_________________
Kevin Herron
Software Developer
Inductive Automation


Thu Jun 28, 2012 6:33 am
Profile WWW
General
General

Joined: Tue Jul 26, 2011 2:34 am
Posts: 160
Post Re: Ignition and PowerLogic EGX100 through modbus RTU
I already did that test and I received the same results.


Thu Jun 28, 2012 7:14 am
Profile
Moderator
Moderator

Joined: Mon Oct 27, 2008 4:10 pm
Posts: 1987
Location: Folsom, CA
Post Re: Ignition and PowerLogic EGX100 through modbus RTU
Time to start troubleshooting then. Look in the logs for error messages from the device.

_________________
Kevin Herron
Software Developer
Inductive Automation


Thu Jun 28, 2012 7:28 am
Profile WWW
General
General

Joined: Wed Feb 24, 2010 5:56 pm
Posts: 617
Post Re: Ignition and PowerLogic EGX100 through modbus RTU
are you able to see the device using a modbus test program? like modbus poll, or modbus scanner?
I usually start testing using one of these programs first, cause they are easy to change settings on quickly. Its especially useful when trying to pull floats because some manufacturers order the data differently from others.


Thu Jun 28, 2012 8:48 am
Profile
General
General

Joined: Tue Jul 26, 2011 2:34 am
Posts: 160
Post Re: Ignition and PowerLogic EGX100 through modbus RTU
I used simply modbus and I realized that I was using the wrong driver. I was using modbus RTU instead of modbus TCP. Now Ignition is reading correctly. My question is why I was not able to connect this same device to Ignition using modbus v1 but I could using modbus v2? :scratch:


Mon Jul 02, 2012 5:17 am
Profile
Cadet
Cadet

Joined: Tue Jun 24, 2014 6:42 am
Posts: 1
Post Re: Ignition and PowerLogic EGX100 through modbus RTU
I believe you were "double-converting" - your gateway strips off the TCP wrapper and reformats the message as an RTU type to send out the serial end of the gateway (I think that mainly involves the CRC, but don't hold me to that) - so you need to communicate with the gateway as a straight Modbus TCP style device.


Tue Jun 24, 2014 6:50 am
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: