Hello all,
I'm am trying to figure out how a message initiated from a controllogix processor writes to a SLC 5/04 using control net.
Reading the example below (Which is a PLC5, only example I could find) I cannot see how N7:10 is mapped to #M0:1.700.
I can see we are initiating a message from source N7:0 to destination N7:10.
However they suggest to use a COP to grab the data from the #M0:1.700 file then place the data in a N11 file.
Where does the N7:10 come in to play? Is this a data table in the scanner module itself?
Is the mapping done in Rs networks?
Any help would be greatly appreciated.
The following example illustrates how a PLC-5 ladder program can
read or write the 1747-SCNR Local Database using the MSG
instruction. The steps in this process correspond to the steps in the
illustrations.
1.
The ladder programmer inserts a MSG instruction into the ladder
program.
2.
This message instruction sends
five words from the PLC-5 N7
data file, starting at offset 0, to remote 1747-SCNR Local
Database file offset 10 (N7:10). The destination node is 22.
3.
The PLC-5 processor is put in
to RUN mode. Then the PLC-5
processor opens an unscheduled connection to the 1747-SCNR
module and messages are exchanged.
4.
The SLC 500 ladder program reads 20 words of 1747-SCNR Local
Database in slot 0 offset 700: #M0:1.700.
5.
Elements from the PLC-5 N7 file are available in the SLC 500 N11
file, starting at address N11:10.
I'm am trying to figure out how a message initiated from a controllogix processor writes to a SLC 5/04 using control net.
Reading the example below (Which is a PLC5, only example I could find) I cannot see how N7:10 is mapped to #M0:1.700.
I can see we are initiating a message from source N7:0 to destination N7:10.
However they suggest to use a COP to grab the data from the #M0:1.700 file then place the data in a N11 file.
Where does the N7:10 come in to play? Is this a data table in the scanner module itself?
Is the mapping done in Rs networks?
Any help would be greatly appreciated.
The following example illustrates how a PLC-5 ladder program can
read or write the 1747-SCNR Local Database using the MSG
instruction. The steps in this process correspond to the steps in the
illustrations.
1.
The ladder programmer inserts a MSG instruction into the ladder
program.
2.
This message instruction sends
five words from the PLC-5 N7
data file, starting at offset 0, to remote 1747-SCNR Local
Database file offset 10 (N7:10). The destination node is 22.
3.
The PLC-5 processor is put in
to RUN mode. Then the PLC-5
processor opens an unscheduled connection to the 1747-SCNR
module and messages are exchanged.
4.
The SLC 500 ladder program reads 20 words of 1747-SCNR Local
Database in slot 0 offset 700: #M0:1.700.
5.
Elements from the PLC-5 N7 file are available in the SLC 500 N11
file, starting at address N11:10.