Applies To:
  • CitectSCADA 5.xx
Summary:
Some devices which are supposed to emulate an Allen Bradley PLCs using ABEI/ABKT protocols, such as ABEI500/ABKT500, are not recognised as being on-line by Citect. 

Solution:
The reason why Citect does not recognise these non-standard devices as being on-line is because of the fact that they don't support the status register which is used by Citect for its on-line check. In order to facilitate the use of these devices with Citect, an extra "ini" option has been added which allows the specification of an alternate register for the on-line check.

To make use of the option, insert the lines

[ABEI]
AltInitReg=B3:0

OR

[ABKT]
AltInitReg=B3:0

into your citect.ini file.

Note that you can use any register type, not just B. It is advisable to use 16 bit registers though. The other numbers (3:0) are the file and segment numbers. These should be familiar to anyone used to AB addressing. Again, any numbers can be used here (as long as they are defined in the target device).

 
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