Siemens ET 200S 1SI Function Manual page 22

Function blocks of the ET 200S 1SI serial interface module
3.2 Function blocks _ET200S_SIxx_send
Time sequence diagram _ET200S_SIxx_send
The following figure illustrates the behavior of the done and error parameters according to the
input circuit of execute and reset.
Figure 3-1
Note
The execute input parameter is edge-triggered. A positive edge at the execute input parameter
is sufficient.
Task integration (call)
The _ET200S_SIxx_send FB must be called cyclically in the BackgroundTask or the
TimerInterruptTask. Calling in the SystemInterruptTask is not permitted. Calling the function
block in the IPOSynchronousTask is not recommended for runtime reasons.
The SIMOTION device sends data to a communication partner
The _ET200S_SIxx_send FB transfers a data block, which is specified by the following
parameters for the serial interface module:
● data corresponds to the data array containing the send data
● dataOffset corresponds to the array index containing the first send byte
● dataLength corresponds to the amount of data to be sent in bytes (maximum of 224 bytes)
22
Time sequence diagram _ET200S_SIxx_send
Supplement to the ET 200S 1SI serial interface module
Function Manual, 01/2015, xxx