7 - 7 7 - 7
MELSEC-Q
7 PROGRAMMING WHEN EXECUTING THE MASTER FUNCTION
7.4 I/O Communication with Slave Nodes
This section explains an example of a sequence program that performs I/O
communication.
If GX Configurator-DN is used, the FROM and TO instructions are not required.
Parameter setting program
I/O communication
start command
Node No. 1 error handling program
Node No. 1 input data processing program
Node No. 2 error handling program
Node No. 2 output data processing program
Node No. 4 error handling program
Node No. 4 input data processing program
Node No. 4 output data processing program
Node No. 3 error handling program
Node No. 3 input data processing program
Parameter setting program
(See Section 7.3.)
Sets the initial setting value
of transmission data.
I/O communication start request
Reads each node's communication
status data.
Reads reception data.
Writes transmission data.
Reads transmission data.
Writes transmission data.
Reads transmission data.
To Next Page
Loading...
Need help?
General
