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HART AI Revision 7 issue

Created by: Mohamed AboDaif at: 2/2/2022 10:35 AM (7 Replies)

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2/2/2022 10:35 AM	Rate (0)
Mohamed AboDaif Advanced Member Joined: 3/4/2015 Last visit: 7/15/2024 Posts: 16 Rating: (11)	I Have 6ES7 331-7TF01-0AB0 with 3.x.x firmware connected to Cron level transmitter HART V7. The issue is that the hart PV reading get frozen after a min from powering up the transmitter and never change again until I cut the power off and on the transmitter again Then the reading come to life again for a min and then freezes again and so on. Is there any solution for this issue Such as firmware update or multipoint dispaly that collects 4 transmitters' readings and then send the readings to the HART AI module via hart PV, SV, TV and QV? And if yes what is the display you advice me to buy.

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2/2/2022 2:11 PM	Rate (0)
Mohamed AboDaif Advanced Member Joined: 3/4/2015 Last visit: 7/15/2024 Posts: 16 Rating: (11)	Sorry its KROHNE not cron

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2/2/2022 2:11 PM
Mohamed AboDaif Advanced Member Joined: 3/4/2015 Last visit: 7/15/2024 Posts: 16 Rating: (11)	Sorry its KROHNE not cron

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2/4/2022 5:32 PM	Rate (0)
danw Gold Expert Joined: 3/28/2010 Last visit: 11/8/2024 Posts: 1074 Rating: (214)	I run into HART on the field instrument side, but not on the Analog Input side. Occasionally a question on HART analog inputs comes up and there's rarely, if ever, any feedback as to how the situatation was resolved, and up until now, no HART AI end-user has been around to answer HART questions. Some considerations about HART: 1. I seriously doubt that a HART AI module is plug-and-play. Getting a HART module up and running is a small project in itself. 2. I would think that if you purchased a HART enabled AI card, that you should be able to configure it to get the PV, SV, TV and QV variables. The stand-alone modules that poll the field instrument and output PV, SV, TV and QV variables are used by people who do not have PLC hardware that cannot handle a HART AI card, so they use the external, stand-alone HART module to get the data from a field transmitter. 3. HART tends to be backwards compatible from the latest HART 7 back through HART 5. You mention that the Krohne transmitter is HART 7. But I don't know about the effect of HART version incompatabilities on the AI card/PLC side. The manual covering HART AI cards, SIMATIC ET 200M distributed I/O device HART analog modules, downloadable below, does not mention the HART version of the AI card. https://support.industry.siemens.com/cs/us/en/view/22063748 The manual does mention firmware updates, firmware revs for the card and Step 7. Have you worked your way through the manual?
	Last edited by: danw at: 02/04/2022 17:42:19 Last edited by: Jen_Moderator at: 02/07/2022 10:14:21 Optimized link.
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This contribution was helpful to 1 thankful Users Mohamed AboDaif

2/5/2022 11:02 PM	Rate (0)
Mohamed AboDaif Advanced Member Joined: 3/4/2015 Last visit: 7/15/2024 Posts: 16 Rating: (11)	Thanks you danw for your reply, My problem with this transmitter only I tried to connect other transmitters and they work just fine The only difference I found between this transmitter and other transmitters is the hart version so i mentioned it.

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2/7/2022 6:59 PM	Rate (0)
danw Gold Expert Joined: 3/28/2010 Last visit: 11/8/2024 Posts: 1074 Rating: (214)	So, when you connect another, older Krohne transmitter with a lower HART version to this HART enabled analog input you can read PV, SV, TV and QV? But when you disconnect the older Krohne transmitter and connect a newer Krohne transmitter with HART 7 on that same analog input, the analog input fails to read even the PV?

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2/9/2022 1:37 PM	Rate (0)
Mohamed AboDaif Advanced Member Joined: 3/4/2015 Last visit: 7/15/2024 Posts: 16 Rating: (11)	Not an Older KROHNE, but another transmitter manufacture with older HART Version but yes when I Connect another transmitter with older HART version I can read PV, SV, TV AND QV healthy. But when I disconnect the older transmitter and connect a Krohne transmitter with HART 7 on that same analog input, the analog input can read the PV for one min then the reading freezes and never changes again.

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2/10/2022 4:34 PM	Rate (0)
danw Gold Expert Joined: 3/28/2010 Last visit: 11/8/2024 Posts: 1074 Rating: (214)	Web searches for difference between HART 5, 6, and 7 reveal that HART functionality is intended to be backwards compatible for commands that are already implemented, like reading multiple variables. Apparently, that is not the case with your equipment. It is interesting to note that Rosemount provides a means of selecting either HART 5 or HART 7 on it hygenic 3051HT pressure transmitter, related to 'compatability'. See the attached extracted page from the Quick Start Guide. You might check to see if the Krohne device offers a similar selection for either HART 5 or HART 7. If you have confirmed that your ET200M module has the latest firmware update, then you'll have to submit a Siemens Support Request for factory assistance with the ET200M. Be sure to include firmware revisions. Edit: added attachment Attachment 3051 QS guide-hygienic-PT hart-revision-5-7-protocol-en-79898.pdf (779 Downloads)
	Last edited by: danw at: 02/11/2022 16:22:05
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This contribution was helpful to 1 thankful Users Mohamed AboDaif

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