1771-SDN Devicenet Signal Output

[ShawnMac33]

I'm setting up digital lock through a Unidrive SP for two servo motors. The process involving the motors goes through 11 stages that are recognized by PLC-5 for each production. The ratio setup in the digital lock is adjusted by as little as 1/1000 in any of these 11 stages and will be fed back to my Unidrive via 1771-SDN to SM-Devicenet.

The operator sets the value in the PLC with digital thumbwheels to a value between 0-9999 for each stage and the PLC will transfer the appropiate number set depending on the stage its in.

1771-SDN manual says to use block transfer write bit for this to send my signal to my SM-Devicenet. So I'm wondering if this is the setup I need. 1771-SDN installed in slot 7 in this case and devicenet channel 1 wired to SM-devicenet, BTW bit captures value between 0-9999 and writes to O:7/0 and then I setup how this number between 0-9999 affects my digital lock ratio in my Unidrive SP.

 

[controlsdude]

I have used the unidrive sp on profibus so its probably the same setup. What is your question?

I know in the profibus setup the unidrive had a predefined rack or node that it wrote or read from. ON the other end, the PLC, you would map this through aliasing in the contrologix processor.

Where ever the SM-devicenet card is on your unidrive you should be able to see this data through your CT software when your online with the drive. And you should also see it on the devicenet scanner address node location in your data area where you defined from your devicenet config.

 

[jde777]

Map your unidrive in to the sdn via rsnetworxs for dnet. Then BTR/BTW length of 62 to get that data.