Video: How to use the DATA_EXCH function block on the M580 via the NOC module to read data from a another Ethernet IP device

Issue:
Is there a working example of the DATA_EXCH function block on the M580 using CIP explicit messaging?

Product Line:
Ethernet IP NOC module, M580

Environment:
Unity Pro software

Resolution:



Follow steps below:

1. Create a M580 project and add a NOC module
2. Add an IP address to the NOC module and disable security in the DTM browser
3. Create a section, in this example, ST was used.
4. Add the DATA_EXCH function block and configured it as shown below

send_buffer[0] := 16#024E; (*High Byte - Path Size, Low Byte - Service Code: Read Holding Registers *)
send_buffer[1] := 16#4420;  (*High Byte - Class, Low Byte - Class Segment *)
send_buffer[2] := 16#0124;  (*High Byte - Instance, Low Byte - Instance Segment *)
send_buffer[3] := 16#0032;  (*Location of the first word to read, in this case 50 *)
send_buffer[4] := 16#0001;   (*Number to read, in this case 1 *)
management_parameters[2] := 10; (* timeout - 1 second 100 x 10 *)
management_parameters[3] := 10;  (* length of senbd buffer in bytes *)


DATA_EXCH (EN := enable,
ADR := converted_address, (* result of ADDM function in "init" section *)
TYP := ActionType,      (* Value of 1 - transmission followed by await reception *)
EMIS := send_buffer,        (*message to send *)
GEST := management_parameters, (* control block *)
RECP => receive_buffer);   (* buffer for returned message *)

Publié pour:Schneider Electric Belgium