MircoLogix 1200 w/ Analog module 1762-IF2OF2
1)Unable to get the scaled with parameters function to work correctly?
It's not excepting my F8 floating point register selection.
2)Also can some one tell me what the difference between the PID scaled input and the raw proportional input are?
I'm trying to create a linear number based off of and analog input signal but when I perform the math ((I:1:0/15600)*(15-0)+0), the value I get is off and not linear. Note: the number Im trying to create is a battery voltage of 0-15vdc.
Is the Input set to PID scaling making my number not linear?
Any help once again would be appreciated
Regards
Lucas777 [QUOTE]I'm not sure what will work yet, but give me a minute and I'll tell you what won't.

Later series ML1200's do support floating point files. When you confirm the project you will get a warning, but it is just that a warning. What series is your unit? The input selection for the expansion module is 0-10V and 4-20 ma, how are you going to connect your battery voltage?

It is brand new and I believe it to be a series C.
And I should have included that I was using a signal conditioner from Wilkerson Instruments to convert the voltage to a current signal.
Any Ideas on the scaling issue?
Regards
Lucas777

As Ken stated, the Series C shouold support floating-point data and the SCP instruction; it will give you that warning every time you add logic with either/both in the rung and verify the file or project. Raw/Proportional data for 4-20mA is 6240 to 31200 (this should be the Input MIN/MAX in your SCP). Scaled-for-PID is 0-16383. Your Scaled MIN/MAX shoud be 0 and 15.

According to the manual for the expansion card the raw data range is:
0-32760
http://literature.rockwellautomation.com/i...itQueryForm=%BB

Ken,

page 1-6 of the MicroLogix 1200/1500 Instruction Set Referrence Manual (1762-RM001E-EN-P) shows valid analog I/O configuration ranges in table 1.1 as 6240-31200 (Raw/Prop) and 0-15600 (Scaled for PID) for 4-20mA. Then in Table 1.2 and 1.3, they show the same ranges in the Pub. you listed. I guess I'm not real sure what it should be, if AB isn't sure.