Any help would be greatly appreciated. I am currently working on creating an HMI/SCADA in LabVIEW that communicates via DNP3 Master Protocol to an SEL RTAC (real time automation controller). The RTAC is connected to a SEL 351s which is basically a relay. I have no problem reading analog inputs and binary inputs from the RTAC which receives the data from the 351s, but have been very unsuccessful in attempting to write to the 351s by using write binary output blocking send command vi in LabVIEW. Basically, I have four binary output bits from the 351s which hold the status of a circuit breaker that I need to be able to control. That is, I need to be able to write either true/false to a binary output value. The point index for the values are 0:3, however, by using the range and values controls that connect to the DNP3 master vi, I am unable to control anything and usually get the IIN response status message. I just need to be able to write t/f to different point indexes in the binary outputs of the 351s that is connected to the RTAC via SEL serial protocol, that is then connected to my LabVIEW as an outstation to my LabVIEW master program. I could really use any help in making this work. Thanks, Drew

Hi Drew, No problem. The data type of "CROB value" and "Control" are both cluster. So you need to bundle your logic (Latch On/Off) into the cluster. Please see the attachment. I create a brief sample and make the logic of switch1 as the example.

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LabVIEW

DNP3 Write Binary Output

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Thank you so much, that helped me out tremendously. If I have any more questions, I know where to go.

Drew

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DNP3 Write Binary Output

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