Send Blocks

On the basis of the communication protocol, it is sensible to restrict the data types at one send block to one type. Therefore, there are 5 types of send blocks: send of status values, commands, real values, setpoints and discrete values. These types are mapped to the IEC1131 data types BOOL, REAL and DINT. See documentation of IEC60870 Library for more information.

Operating modes of the send blocks

The send blocks know three operating modes to send their data:

• Caused by request pin (SEND)
• Send in connection with a change of data (AUTO)
• Cyclic send of data (CYCLE)