• Replies 3 replies
  • Subscribers 582 subscribers
  • Views 544 views
  • Users 0 members are here
Options
Related

Citect String Array Tags

Lou

Trying to make a variable String Array tag to link to an OPC Server.

Setup a STRING Variable to look at a specific index (the addressing scheme for the Opto22 OPC allows this type of selection) without the !A[x] suffix used make it a string array tag. Was able to read/write the contents of this index. Note this was a long text string which worked fine. Addressing schemes for other string arrays do not allow individual index selection.

 If I use the !A[X] suffix on the address string (which works on Integer and Float Arrays) not only doesn’t it work but the IOServer crashes if I try to read a specific index.

Any insight to creating String Array tags that work would be greatly appreciated. FYI using CitectScada 7.50 (2015)

Parents
  • Here's an update regarding String Arrays in Citect - my local support guy (who got it from Citect Support) tells me that CitectScada does NOT handle String Arrays. Could NOT find this fact online or within the documentation.

    If the OPC Addressing scheme allows individual indexes to be accessed (which I've done) you can bring these indexes as string variables.

    However if your OPC Addressing scheme does not allow selection of individual indexes (which I've also run into) then you are basically out of luck.

    Hard to believe that a system as complete as CitectScada cannot handle string arrays when a cheap OPC Test Client can. When I look at the OPC Server, I can see that Citect sets up the String Array, but read/write to individual indexes seems to be blocked.
    I'm hoping that this is something Citect can work into future releases.

    If anybody has another way of bringing String Arrays into Citect (other than what I mentioned above), please let us know.
    Citect Support - can you please comment on this issue.
Reply
  • Here's an update regarding String Arrays in Citect - my local support guy (who got it from Citect Support) tells me that CitectScada does NOT handle String Arrays. Could NOT find this fact online or within the documentation.

    If the OPC Addressing scheme allows individual indexes to be accessed (which I've done) you can bring these indexes as string variables.

    However if your OPC Addressing scheme does not allow selection of individual indexes (which I've also run into) then you are basically out of luck.

    Hard to believe that a system as complete as CitectScada cannot handle string arrays when a cheap OPC Test Client can. When I look at the OPC Server, I can see that Citect sets up the String Array, but read/write to individual indexes seems to be blocked.
    I'm hoping that this is something Citect can work into future releases.

    If anybody has another way of bringing String Arrays into Citect (other than what I mentioned above), please let us know.
    Citect Support - can you please comment on this issue.
Children
No Data
© 2025 AVEVA Group Limited or its subsidiaries. All Rights Reserved.