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how to extend 80 characters PI Point name

Question asked by kcaldana on Jun 19, 2019
Latest reply on Jun 19, 2019 by kcaldana

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what does it means?

-PitoPI version 3.8.9

-PI Data archive version 3.5.7 (2017 R2)

-PI API 1.6.8

Said that can extend the maximum length of the character?

after that the manual said if you name length exceed 80 character userint1

how can i use the 1023 or 255 maximum length of the character?

Eugene Lee Jun 19, 2019 8:18 AM

Correct Answer

The table you reference is just showing you how long the Point name can be based on different versions of the PI Server and PI API. It is a separate topic from the issue of mapping source points to target points.

There are three options for mapping source points to target points:

Set the target point’s InstrumentTag attribute to the name of the source point.
Specify the name of the source point in the target point’s ExDesc attribute, using the /STAG flag.
Set the target point’s UserInt1 attribute to the source point’s PointID (the unique numeric identifier of the source point, displayed on the System tab of PI SMT’s Point Builder tool). This approach ensures that the mapping remains valid if the source point is renamed.

You will want to use the last option if your source point name is more than 80 characters. i.e. you can't use the first or second option.

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gregor Jun 19, 2019 8:16 AM

Hi Kevin,

You refer the source point by its Point ID in the UserInt1 attribute of the receiving point.

I am looking at a more recent version of the PI-to-PI Interface manual (3.9.4) which details How the PI to PI Interface finds source points within the Principles of operation chapter but expect you should find the same information in the version (3.8.9) you are using.

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Eugene Lee Jun 19, 2019 8:18 AM

There are three options for mapping source points to target points:

Set the target point’s InstrumentTag attribute to the name of the source point.
Specify the name of the source point in the target point’s ExDesc attribute, using the /STAG flag.
Set the target point’s UserInt1 attribute to the source point’s PointID (the unique numeric identifier of the source point, displayed on the System tab of PI SMT’s Point Builder tool). This approach ensures that the mapping remains valid if the source point is renamed.

You will want to use the last option if your source point name is more than 80 characters. i.e. you can't use the first or second option.

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kcaldana Jun 19, 2019 8:35 AM

Hi Gregor and Eugene,

I understand now so even i enable the PI SDK in the PItoPI interface its useless to use the 1023 maximum length?

the features not support too, am i right?

Uses PI SDK* = NO

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Eugene Lee @ kcaldana on Jun 19, 2019 8:38 AM

Your understanding is correct. You have to use the UserInt1 field to map if your source tag name is longer than 80 chars.

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gregor @ kcaldana on Jun 19, 2019 8:42 AM

Hello Kevin,

Well, it is written in the manual that PI SDK is not supported and I tend to believe the manual. On the other hand I would expect that the PI-to-PI Interfaces PI ICU plug-in knows about the limitation and hence showing the option grayed out.

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kcaldana Jun 19, 2019 8:43 AM

ok already understand.. thanks eugene ang gregor

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6 Replies

gregor Jun 19, 2019 8:16 AM
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Hi Kevin,

You refer the source point by its Point ID in the UserInt1 attribute of the receiving point.
I am looking at a more recent version of the PI-to-PI Interface manual (3.9.4) which details How the PI to PI Interface finds source points within the Principles of operation chapter but expect you should find the same information in the version (3.8.9) you are using.

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Eugene Lee Jun 19, 2019 8:18 AM
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Correct Answer
The table you reference is just showing you how long the Point name can be based on different versions of the PI Server and PI API. It is a separate topic from the issue of mapping source points to target points.

There are three options for mapping source points to target points:
- Set the target point’s InstrumentTag attribute to the name of the source point.
- Specify the name of the source point in the target point’s ExDesc attribute, using the /STAG flag.
- Set the target point’s UserInt1 attribute to the source point’s PointID (the unique numeric identifier of the source point, displayed on the System tab of PI SMT’s Point Builder tool). This approach ensures that the mapping remains valid if the source point is renamed.
You will want to use the last option if your source point name is more than 80 characters. i.e. you can't use the first or second option.
1 person found this helpful
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kcaldana Jun 19, 2019 8:35 AM
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Hi Gregor and Eugene,

I understand now so even i enable the PI SDK in the PItoPI interface its useless to use the 1023 maximum length?
the features not support too, am i right?
Uses PI SDK* = NO
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- Eugene Lee @ kcaldana on Jun 19, 2019 8:38 AM
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  Your understanding is correct. You have to use the UserInt1 field to map if your source tag name is longer than 80 chars.
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- gregor @ kcaldana on Jun 19, 2019 8:42 AM
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  Hello Kevin,
  
  Well, it is written in the manual that PI SDK is not supported and I tend to believe the manual. On the other hand I would expect that the PI-to-PI Interfaces PI ICU plug-in knows about the limitation and hence showing the option grayed out.
  Like • Show 0 Likes0
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kcaldana Jun 19, 2019 8:43 AM
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ok already understand.. thanks eugene ang gregor
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how to extend 80 characters PI Point name

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