Help on Micrologix1500 Error

jim-garcia

Member
Join Date
Oct 2003
Location
Reynosa
Posts
42
Hello all

I try to set a value into analog output from 0 -10V
using the scp on verify file show not errors
but at verify project show the next error

Operand sizes did not match

here is my scp parameters

SCP
Input N7:0
input min 0
input max 100
scaled min -32768
scaled max 32768
output O:3.0

thank you all for your time
 
If the Analog Output is configured for 0-10 VDC then the SCP operand Scaled Min should be 0 and Scaled Max should be 32767.
 
Last edited:
What analog card do you have? Complete catalog number please.

How do you have the card configured? ( which data data format are you using?

Post your .RSS file if you can. ( zip it first)

The upper range is 32767 not 32768. But the upper range for 10V depends on the card and how you have it configured.
 
Last edited:
Error Help on micrologix 1500

What analog card do you have? Complete catalog number please.

How do you have the card configured? ( which data data format are you using?

Post your .RSS file if you can. ( zip it first)

The upper range is 32767 not 32768. But the upper range for 10V depends on the card and how you have it configured.

thank you

here is a copy of my code

does the n7:0 can be used instead of an analog input ?

one more time thank you all for your help
 
Yes you can use N7:0 in the SCP instruction.

See picture below, take note of the count values for a 0-10 volt output from your card.
You will need to change the scaled min/max to get 0-10 volts output.

-29788 = 0 volts
+29788 = 10 volts.

countvalues.png
 
help on micrologix 1500

Yes you can use N7:0 in the SCP instruction.

See picture below, take note of the count values for a 0-10 volt output from your card.
You will need to change the scaled min/max to get 0-10 volts output.

-29788 = 0 volts
+29788 = 10 volts.

hi thank you for comments
one more thing when I try to run the CPU it go to error
say the module vendor not identified
any Idea

thank you for your time
jim
 
hi thank you for comments
one more thing when I try to run the CPU it go to error
say the module vendor not identified
any Idea

thank you for your time
jim


Here a knowledgebase article that might have something in there. I don't have a tech connect contract to view it. If you do take a look or maybe someone who does can look.


20289 - Processor I/O fault for 1769-OF2, 1769-OF8C, 1769-OF8V, 1769-OF4CI and 1769-OF4VI Modules
This document is based on the following assumptions: The module will be correctly connected to any CompactLogix or MicroLogix 1500 controller. Modules include: 1769-OF2 1769-OF8C 1769-OF8V 1769-OF4CI...
Access Level: TechConnect
Created: 10/03/2001
Updated: 01/11/2013
 
I skimmed through that article and don't think it applies to this fault.

I think the first thing I'd try and reconfiguring the I/O config of the project and making sure my I/O module was connected correctly.
 
Never did it myself either...I have used 1762 expansion hardware on ML1200s but never 1769 on ML1500s...
The 1769 Analog Modules do not have a 16 bit resolution when used on "partitions" of the full Min/Max range; that's where the +/- 29788 raw values come from for a 1769-OF8V; the 16-bit resolution (+/- 32767) is used to detect "under/over Range" conditions.
 

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