adccommunitymod (AutomationDirect) asked a question.
Created Date: May 22,2010
Created By: kermitbindy
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I am using the Click PLC as a Slave with nothing but an end statement in the PLC. I'm using Modscan and chipkin software in conjunction with my own DDC controller to map registers. How do I get the correct decimal address for the first FLOAT register. (DF1) I have opened the click address picker and tried to find what register to type into Modscan but I can't work out what register to use. It states that DF1 FLOAT is Modbus 428673 Function code (03) I can't work out how to convert this to a normal modbus register offset.
Created Date: May 23,2010
Created by: BAK96
Just leave out the 4, type in 28673. The Click uses 6 digit internally for floating point instead of 5 digits. I had the same problem hooking up a 3rd party HMI to the Click. Took me a few min. to figure out.
Created Date: May 25,2010
Created by: kermitbindy
Thanks I'm fairly new to modbus. I was going too deep, wondering if it was oct to dec or something funny like that.
Created Date: July 06,2011
Created by: MikeMc
Click Floating Numbers
Here's another point to consider. When getting data from the Click into the D4-450 CPU, the floating point numbers will be by word swapped. If you use a program like Modbus Poll and reverse the floating point number you will get the correct value. If you don't reverse them you will get the same number that the $%) 450 will see.
Mike
:mad:
Created Date: May 22,2010
Created by: kermitbindy
I am using the Click PLC as a Slave with nothing but an end statement in the PLC. I'm using Modscan and chipkin software in conjunction with my own DDC controller to map registers. How do I get the correct decimal address for the first FLOAT register. (DF1) I have opened the click address picker and tried to find what register to type into Modscan but I can't work out what register to use. It states that DF1 FLOAT is Modbus 428673 Function code (03) I can't work out how to convert this to a normal modbus register offset.