Factory Talk SE varible which can be calculated to attach to another varibale in PLC

zdinani

Member
Join Date
Oct 2016
Location
montreal
Posts
2
Hi,
I have a problem in Factory Talk SE.
I have a numeric input variable which is supposed to be in millisecond (ms) and I have the tag in PLC in Micro second. I do not have any idea how to get this ms from user and write it into micro second vriable in PLC and also vise versa. because I would like to also be able to read the value of micro second in plc in ms on Scada page. I am not sure the solution is VBA code or something else but have tried both ways and to no avail. Does anyone have any idea.
 
There are a few ways to do it.

Instead of using a direct reference to the PLC tag, you could create a HMI tag and attach it to the PLC tag. Then you can set up scaling, so 0-100ms on the SCADA corresponds to 0-100000us in the PLC.

Or, and this would be my choice, just multiply your value by 1000 in the PLC. It's quick, clean, and you can see what's going on instead of a behind-the-scenes scaling trick that you can't see.
 

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