Help
  • Explore Community
  • Get Started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Notifications
Login / Register
Community
Community
Notifications
close
  • Forums
  • Knowledge Center
  • Events & Webinars
  • Ideas
  • Blogs
Help
Help
  • Explore Community
  • Get Started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Login / Register
Sustainability
Sustainability

We Value Your Feedback!
Could you please spare a few minutes to share your thoughts on Cloud Connected vs On-Premise Services. Your feedback can help us shape the future of services.
Learn more about the survey or Click here to Launch the survey
Schneider Electric Services Innovation Team!

PM8000 and Modbus TCP/IP

Metering & Power Quality

Schneider Electric support forum about Power Meters (ION, PowerTag, PowerLogic) and Power Quality from design, implementation to troubleshooting and more.

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 
  • Home
  • Schneider Electric Community
  • EcoStruxure Power & Grid
  • Metering & Power Quality
  • PM8000 and Modbus TCP/IP
Options
  • Mark Topic as New
  • Mark Topic as Read
  • Float this Topic for Current User
  • Bookmark
  • Subscribe
  • Mute
  • Printer Friendly Page
Invite a Co-worker
Send a co-worker an invite to the portal.Just enter their email address and we'll connect them to register. After joining, they will belong to the same company.
You have entered an invalid email address. Please re-enter the email address.
This co-worker has already been invited to the Exchange portal. Please invite another co-worker.
Please enter email address
Send Invite Cancel
Invitation Sent
Your invitation was sent.Thanks for sharing Exchange with your co-worker.
Send New Invite Close
Top Experts
User Count
Charles_Murison
Picard Charles_Murison Picard
484
Ramasamy_N
Captain Ramasamy_N Captain
113
Robert_Lee
Admiral Robert_Lee Admiral
92
Mehran_Mehrnia
Captain Mehran_Mehrnia Captain
89
View All

Invite a Colleague

Found this content useful? Share it with a Colleague!

Invite a Colleague Invite
Back to Metering & Power Quality
michael_franz
Admiral michael_franz
Admiral

Posted: ‎2016-09-23 06:19 AM

2 Likes
3
3713
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

‎2016-09-23 06:19 AM

PM8000 and Modbus TCP/IP

TEAM:

We have been experimenting with our fleet of PM8000 meters situated in our lab.  Two out of four would not communicate over Modbus TCP/IP but would report fine with ION protocol.

A colleague of mine, Bryan Robertson and I discussed why Modbus TCP/IP worked on some meters and not others.  After we mapped out all the differences between the devices Bryan noticed that the two meter that were not working on Modbus TCP/IP had their serial port set to gateway mode in ION Setup. 

This morning we disabled this function and now are able to read the device data over Ethernet with the Modbus protocol.  Wanted to let you know and give a shout-out to Bryan for seeing something that the rest of us missed.  . 

There is no reason that enabling the com-port gateway mode should stop Modbus TCP/IP upstream communication.  We trust that this will be addressed in the next firmware revision

Thanks and congratulation to Bryan.

We hope that this save hours of grief for others who have this problem.

gateway.jpg

ADDITIONAL NOTE:

Apparently the default Modbus address is locked in at 255 when the Gateway mode is enabled.  This may have been covered in training at some time and I forgot.  It would be nice if this were indicated during setup to remind users of this fact.

Tags (4)
  • Tags:
  • gateway mode
  • ion set-up
  • modbus tcp
  • pm 8000
Reply
  • All forum topics
  • Previous Topic
  • Next Topic
Replies 3
Marvin_Foster
Ensign Marvin_Foster Ensign
Ensign

Posted: ‎2016-09-23 12:08 PM

2 Likes
2
3597
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

‎2016-09-23 12:08 PM

Hey Michael  -  long time,

I believe that this behavior is intentional.  When Gateway is enabled, looks at the Unit Id on the data request and if it is ID=255 it uses the registers in the meter for it's response.  If the ID=something else, it routs that request to the serial port to a presumed downstream devices.

When Gateway is Disabled, the meter ignores the unit id and responds to all register requests from the meter register table.

Reply
michael_franz
Admiral michael_franz
Admiral

Posted: ‎2016-09-23 01:24 PM

0 Likes
0
3597
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

‎2016-09-23 01:24 PM

Marvin:

It is great to hear from you.

It is still confusing and buried in documentation.  The rev of the PM8000 manual covering this is missing the address change detail.  It would be nice it ION Setup or the web page of the meter let the user know that the unit ID had changed.  It will become one of those things you just gota know now.

Thanks,

Your friend,

Michael Franz

Reply
patrickw
Ensign patrickw Ensign
Ensign

Posted: ‎2016-10-04 11:00 AM

0 Likes
0
3597
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

‎2016-10-04 11:00 AM

This is correct, and for people who find this case in the future, this behaviour is the same for all of the devices with the modbus gateway functionality (ION7550, ION7650, PM8000, ION7400).

Unit ID 255 is one of the reserved addresses in the Modbus spec, typically used to address the gateway device itself while all other unit IDs are passed downstream.

Reply
To The Top!

Forums

  • APC UPS Data Center Backup Solutions
  • EcoStruxure IT
  • EcoStruxure Geo SCADA Expert
  • Metering & Power Quality
  • Schneider Electric Wiser

Knowledge Center

Events & webinars

Ideas

Blogs

Get Started

  • Ask the Community
  • Community Guidelines
  • Community User Guide
  • How-To & Best Practice
  • Experts Leaderboard
  • Contact Support
Brand-Logo
Subscribing is a smart move!
You can subscribe to this board after you log in or create your free account.
Forum-Icon

Create your free account or log in to subscribe to the board - and gain access to more than 10,000+ support articles along with insights from experts and peers.

Register today for FREE

Register Now

Already have an account? Login

Terms & Conditions Privacy Notice Change your Cookie Settings © 2025 Schneider Electric

This is a heading

With achievable small steps, users progress and continually feel satisfaction in task accomplishment.

Usetiful Onboarding Checklist remembers the progress of every user, allowing them to take bite-sized journeys and continue where they left.

of