Internet PLC Forum
General => Technical support => Topic started by: jrustang on September 05, 2007, 08:45:35 AM
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Hi, I'm trying to use the analog output 7 and 8 of the PLC TM100+ 4832, but I'm having a problem. After i execut the ?setDAC? command on the respective channel(s) I test with a Multimeter (the - on the AVss and the + to the Output channel that I want to use) to see how many volts are coming out, But I get nothing. Any Idea for this Newbie... Thanks
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T100MX-4832 requires a user-supplied 5V external analog reference voltage connected to its AVcc terminal. So please connect a 5V voltage source to its AVcc and AVss terminal and you will then be able to get 0-5V output on its two DAC channel based on the SETDAC value.
As the AVcc signal goes directly to the CPU please ensure that only the correct voltage is applied to this pin otherwise the CPU can be permanently damaged if a wrong voltage is applied.
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Thank you for your answer.
I already had conectet the 5v power supply and is well conectet 'because I have allready install an analog divice on the analog input number 1 and is working fine. And that's why I don't find an explanation why is not working
Have Another Idea that can help me?
Thank you very much !!!
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Remember that AD#7 shares with DA#1. AD #7 pin shares with DA#2, so your command should be:
SETDAC 1,2048
SETDAC 2, 1024
Then measure on the analog DB15 connector at pin 2 and pin 1 respectively. Pin 8 is for Analog input 1, pin 7 for AI #2,....
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That's why you need to talk to the expert ones....
That was the answer... Thank you...!!!