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Old December 7th, 2017, 09:34 AM   #1
grant.dotulong
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Connected Components Workbench Analog Output Programming Trouble!!

Hi all,

I'm having trouble programming the analog output on my Allen Bradley Micro850 with OF4 extension. I enabled the channels, minimum-maximum output range 4-20mA, with the data format in engineering units. I'm trying to control an inverter wired to a motor. I used the MOV instruction block to assign my analog output with values from my analog inputs, but it seems that the analog output does not produce any signals (tried with my multimeter) even though there are values in CCW's live mode. Does anyone have the solution for this?

Thanks,

-Grant
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Old December 7th, 2017, 10:09 AM   #2
geniusintraining
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Post a screenshot of your logic, this is a move input 0 to output 0
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Old December 7th, 2017, 10:24 AM   #3
grant.dotulong
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Here's my program.
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Old December 7th, 2017, 11:13 AM   #4
AustralIan
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You want 4000 for 4mA and 20000 for 20mA if using engineering units.
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Old December 7th, 2017, 02:35 PM   #5
damica1
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Quote:
Originally Posted by grant.dotulong View Post
Hi all,

but it seems that the analog output does not produce any signals (tried with my multimeter) even though there are values in CCW's live mode
I don't think the output is suppose to be a signal that you can measure with your meter! According to the global parameters for the OF4 output it is an "INT" value. So to me this would probable a 16 bit word value just as if you was reading a Modbus Address Value.

I don't know how the inverter will interpret that value.(I don't know how you would be communicating that value to the inverter??)

Now if you are communicating to the inverter with modbus all you would have to do is MOV that output to the modbus address for let's say speed and the inverter would respond according to the word value in the output.

Now I may not understand anything that you are trying to do, so if I am way off base please forgive, and just disregard this post!

Thanks
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Old December 7th, 2017, 11:03 PM   #6
grant.dotulong
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Originally Posted by AustralIan View Post
You want 4000 for 4mA and 20000 for 20mA if using engineering units.
@AustralIan

Thanks man! totally works now
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