Help
  • Get started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Login / Register
Brand Logo
Help
  • Get started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
close
  • Community Home
  • Forums
    • By Topic
    • By Topic
      EcoStruxure Building
      • Field Devices Forum
      • SmartConnector Forum
      EcoStruxure Power & Grid
      • Gateways and Energy Servers
      • Metering & Power Quality
      • Protection & Control
      APC UPS, Critical Power, Cooling and Racks
      • APC UPS Data Center & Enterprise Solutions Forum
      • APC UPS for Home and Office Forum
      EcoStruxure IT
      • EcoStruxure IT forum
      • EcoStruxure IT™ Advisor CFD
      Remote Operations
      • EcoStruxure Geo SCADA Expert Forum
      • Remote Operations Forum
      Industrial Automation
      • Alliance System Integrators Forum
      • AVEVA Plant SCADA Forum
      • CPG Expert Forum DACH
      • EcoStruxure Automation Expert / IEC 61499 Forum
      • Fabrika ve Makina Otomasyonu Çözümleri
      • Harmony Control Customization Forum
      • Industrial Edge Computing Forum
      • Industry Automation and Control Forum
      • Korea Industrial Automation Forum
      • Machine Automation Forum
      • Modicon PAC Forum
      • PLC Club Indonesia
      Schneider Electric Wiser
      • Schneider Electric Wiser Forum
      Power Distribution IEC
      • Eldistribution & Fastighetsautomation
      • Elektrik Tasarım Dağıtım ve Uygulama Çözümleri
      • Paneelbouw & Energie Distributie
      • Power Distribution and Digital
      • Solutions for Motor Management
      • Specifiers Club ZA Forum
      • Електропроектанти България
      Power Distribution NEMA
      • Power Monitoring and Energy Automation NAM
      Power Distribution Software
      • EcoStruxure Power Design Forum
      • LayoutFAST User Group Forum
      Energy & Sustainability Services
      • Green Building Scoring and Certification Forum
      Light and Room Control
      • SpaceLogic C-Bus Forum
      Solutions for your Business
      • Solutions for your Business Forum
      Support
      • Ask the Community
  • Knowledge Center
    • Building Automation Knowledge Base
    • Remote Operations Devices Knowledge Base
    • Geo SCADA Knowledge Base
    • Industrial Automation How-to videos
    • Digital E-books
    • Success Stories Corner
    • EcoStruxure IT Help Center
  • Events & Webinars
    • All Events
    • Innovation Talks
    • Innovation Summit
    • Let's Exchange Series
    • Partner Success
    • Process Automation Talks
    • Technology Partners
  • Ideas
    • EcoStruxure Building
      • EcoStruxure Building Advisor Ideas
      Remote Operations
      • EcoStruxure Geo SCADA Expert Ideas
      • Remote Operations Devices Ideas
      Industrial Automation
      • Modicon Ideas & new features
  • Blogs
    • By Topic
    • By Topic
      EcoStruxure Power & Grid
      • Backstage Access Resources
      EcoStruxure IT
      • EcoStruxure IT™ Advisor CFD
      Remote Operations
      • Remote Operations Blog
      Industrial Automation
      • Industrie du Futur France
      • Industry 4.0 Blog
      Power Distribution NEMA
      • NEMA Power Foundations Blog
      Energy & Sustainability Services
      • Active Energy Management Blog
      Light and Room Control
      • KNX Blog
      Knowledge Center
      • Digital E-books
      • Geo SCADA Knowledge Base
      • Industrial Automation How-to videos
      • Remote Operations Devices Knowledge Base
      • Success Stories Corner
  • companyImpact

Important Announcement: Community Back to Full Functionality

Dear Members, we are thrilled to announce that our Community is back to full functionality and that posts publication is now enabled again! We appreciate your patience during the last weeks. Learn more about our Community Guidelines. Thank you, Schneider Electric Community Team.

Is it possible to read Wh to 2 digits of precision on the PM5000 range?

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
  • Communities
  • EcoStruxure Power & Grid
  • Metering & Power Quality
  • Is it possible to read Wh to 2 digits of precision on the PM5000 range?
Options
  • Subscribe to RSS Feed
  • 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
299
Ramasamy_N
Commander Ramasamy_N Commander
75
DanL
Captain DanL Captain
72
Robert_Lee
Captain Robert_Lee Captain
67
View All

Invite a Colleague

Found this content useful? Share it with a Colleague!

Invite a Colleague Invite
Solved Go to Solution
Back to Metering & Power Quality
Solved
JamesAZZO
Sisko | EcoXpert Master JamesAZZO Sisko | EcoXpert Master
Sisko | EcoXpert Master

Posted: ‎2014-02-25 04:11 PM

0 Likes
5
381
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

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

‎2014-02-25 04:11 PM

Is it possible to read Wh to 2 digits of precision on the PM5000 range?

We can see on the front panel that kW power readings have 5 decimal places. Is it possible to read the 5 decimal places in Modbus comms? Consequently, will you also be able to read kWh to that same 5 digits of precision?

Reply
  • All forum topics
  • Previous Topic
  • Next Topic

Accepted Solutions
Robert_Lee
Captain Robert_Lee Captain
Captain

Posted: ‎2014-03-03 09:36 AM

0 Likes
1
316
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

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

‎2014-03-03 09:36 AM

Hi James,

     I'll try and answer your question as I've done some work with all the PM5XXX devices.  The Power parameters are passed via Modbus using standard IEEE 754 Float32 notation using 2 16-bit registers.  This will allow Power parameters such as kW to have up to 7 significant digits.  Thus for low power readings the front panel can display up to 5 decimal places (but as readings increase the # of digits after the decimal will reduce).  Software like ION:S may display using some type of fixed decimal representation or could dynamically adjust but showing more significant digits is meaningless.

For energy registers, the PM5XXX series passes values as an INT64 register in 4 x 16 bit registers (which represents only whole numbers without any decimals) but are passed at the lowest possible unit (ex. Wh instead of kWh).  Thus depending on how the software wants to display this information this could show up to 3 decimals (i.e.  if they show the label as kWH, then the number would be divided by 1000).

The front panel looks like it will still show this value with decimal places but those decimal places will never have any significance (i.e. lowest unit is 1 Wh which will show on the display as 1.0000 Wh).  Only whole numbers of Wh will be contained in the registers.

Hope this answers your questions.

See Answer In Context

Reply
Replies 5
JamesAZZO
Sisko | EcoXpert Master JamesAZZO Sisko | EcoXpert Master
Sisko | EcoXpert Master

Posted: ‎2014-03-02 04:57 AM

0 Likes
0
316
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

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

‎2014-03-02 04:57 AM

Anyone?

Reply
sesa186702
Lt. Commander sesa186702
Lt. Commander

Posted: ‎2014-03-02 06:51 AM

0 Likes
1
316
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

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

‎2014-03-02 06:51 AM

What are you mentioning here? Power (kW) or Energy consumption (Wh) ?

Reply
JamesAZZO
Sisko | EcoXpert Master JamesAZZO Sisko | EcoXpert Master
Sisko | EcoXpert Master

Posted: ‎2014-03-02 03:22 PM

0 Likes
0
316
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

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

‎2014-03-02 03:22 PM

Both actually, per my questions above.

We can see that kW (power) shows 5 decimal places on the front panel at low loads but Modbus only shows 3. Similar for kWh, but that might be because of the amount of whole digits able to be shown on the front panel. Software shows 3 decimals, similar to kW.

Reply
Robert_Lee
Captain Robert_Lee Captain
Captain

Posted: ‎2014-03-03 09:36 AM

0 Likes
1
317
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

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

‎2014-03-03 09:36 AM

Hi James,

     I'll try and answer your question as I've done some work with all the PM5XXX devices.  The Power parameters are passed via Modbus using standard IEEE 754 Float32 notation using 2 16-bit registers.  This will allow Power parameters such as kW to have up to 7 significant digits.  Thus for low power readings the front panel can display up to 5 decimal places (but as readings increase the # of digits after the decimal will reduce).  Software like ION:S may display using some type of fixed decimal representation or could dynamically adjust but showing more significant digits is meaningless.

For energy registers, the PM5XXX series passes values as an INT64 register in 4 x 16 bit registers (which represents only whole numbers without any decimals) but are passed at the lowest possible unit (ex. Wh instead of kWh).  Thus depending on how the software wants to display this information this could show up to 3 decimals (i.e.  if they show the label as kWH, then the number would be divided by 1000).

The front panel looks like it will still show this value with decimal places but those decimal places will never have any significance (i.e. lowest unit is 1 Wh which will show on the display as 1.0000 Wh).  Only whole numbers of Wh will be contained in the registers.

Hope this answers your questions.

Reply
JamesAZZO
Sisko | EcoXpert Master JamesAZZO Sisko | EcoXpert Master
Sisko | EcoXpert Master

Posted: ‎2014-03-03 11:44 PM

1 Like
0
316
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

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

‎2014-03-03 11:44 PM

Thanks Robert! Exactly the answer I needed (although not what I was hoping for). I figured it was only measuring in Wh. If you can believe this, we have a customer who wants to be measuring energy down to the 0.00 of a Wh. (not kWh) - crazy and unmeaningful in 99.99999 of cases.

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 forum after you log in or create your free account.
Forum-Icon

Create your free account or log in to subscribe to the forum - 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 © 2023 Schneider Electric, Inc