Cp440 Slave" Program Example - Siemens SIMATIC S7-400 Equipment Manual

9.6.5

"CP440 SLAVE" Program Example

In FB 40, RECV is called to query whether a job has been received from the master. For this
purpose, in the receive message frame the slave address is compared with its own address. As
soon as there is a job, the reply is sent to the master with the SEND call.
The parameters can be adapted for other slaves in OB 1.
Point-to-point connection CP 440 Installation and Parameter Assignment
Equipment Manual, 03/2022, A5E00057742-AE
Programming Example for Standard Function Blocks
9.6 Activation, Startup Program and Cyclic Program
115