lbric
Member
Hello,
a while back ago i posted a question about device net communications between an allen bradley PLC5 and a micro motion flow meter. I never went back to that post because i was severely under informed with device net and would have just wasted peoples time.
after diving into the subject more i now have a good grasp of whats going on but still have a question. I have a device net network where i have a flow meter on node 63 that sending data to the 1771-sdn modules input table. the PLC5 reads/writes the data with BTR/BTW instructions.
when i look at the scanner card properties, i see that its using a block transfer 62 to pull the data in from the flow meter. the data is 21 bytes long so the input setup tab shows a total of 168 bits being pulled in. what i dont see here is where the data is coming from.
i started to look at the micromotion flow meter in rsnetworxs and pulled out the EDS file and saw where the data is coming from. there is a group of data called input 6 that is 21 bytes long so i understand where 168 comes from.
now here is the issue, there is more data that i want to bring in that does not reside in input 6, there is another group input 7 that is also 21 bytes long that has the additional data.
how can i bring in two sets of input data into the scanner card so its accessible to my plc? i am writting this post away from my work computer so im trying to recall as much from memory after a long day so i can clarify any questions that arise.
thanks
Ricardo L.
a while back ago i posted a question about device net communications between an allen bradley PLC5 and a micro motion flow meter. I never went back to that post because i was severely under informed with device net and would have just wasted peoples time.
after diving into the subject more i now have a good grasp of whats going on but still have a question. I have a device net network where i have a flow meter on node 63 that sending data to the 1771-sdn modules input table. the PLC5 reads/writes the data with BTR/BTW instructions.
when i look at the scanner card properties, i see that its using a block transfer 62 to pull the data in from the flow meter. the data is 21 bytes long so the input setup tab shows a total of 168 bits being pulled in. what i dont see here is where the data is coming from.
i started to look at the micromotion flow meter in rsnetworxs and pulled out the EDS file and saw where the data is coming from. there is a group of data called input 6 that is 21 bytes long so i understand where 168 comes from.
now here is the issue, there is more data that i want to bring in that does not reside in input 6, there is another group input 7 that is also 21 bytes long that has the additional data.
how can i bring in two sets of input data into the scanner card so its accessible to my plc? i am writting this post away from my work computer so im trying to recall as much from memory after a long day so i can clarify any questions that arise.
thanks
Ricardo L.