TC ST

Created by: Import-User-1 at: 3/17/2014 11:45 AM (2 Replies)

3/17/2014 11:45 AM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	hi,Import of a Technical Question of the User ACCORDEON ACCORDEON i can not read out my analog module with pt100 connected to it .the analog module sits in slot 4 and it is not possible to read out addres AI38 ; i tried to read out with ID38 but i get always the min value -32767 do you know what i do wrong or how i can read out te correct temperature with this pt 100? or do you have a small program that reads out just one analog value to start ? thanks
Import-User-1 Posts: 3609 Rating: (29)
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9/18/2014 6:42 PM	Rate (0)
TrueB Posts: 22 Rating: (6)	Hello, According to thatmodules manual, starting in section C.1 they list the input ranges for the module. When your temperature probe is operating correctly the input value will be between -27648 to +27648. If you are receiving a value of -32768 then that particular input is in an underflow condition which indicates there is a problem. I would suggest checking the modules diagnostics to try and pinpoint any problems that might be occurring. In the manual you will find descriptions of diagnostic codes and instructions for proper connection and configuration of the module. Hope this helps
TrueB Posts: 22 Rating: (6)
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9/19/2014 8:29 AM	Rate (0)
Marcjan Platinum Member Joined: 4/22/2010 Last visit: 2/26/2025 Posts: 5697 Rating: (716)	Hello, What PT100 you have there? 2,3 or 4 wire? In case of 2 wire you have to make 2 bridges to the compensation inputs, in case of 3 wire you have to bridge 1. Did you mix up compensation and pt100 input? What about the settings, used the right settings? Regards, Marcjan
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