DPM_READ_INPUT¶
| Parameter | Value |
|---|---|
| Library_File_Name | PROFIBUS_AC500_V25.lib |
| Firmware | V2.5 |
| Type | Type_Function_Block_History |
| Group | Data |
The Function Block DPM_READ_INPUT implements the acyclic PROFIBUS DP function DDLM_RD_Inp which can be used to read input data of a slave. Using this function the master can read also input data of slaves which are assigned to other masters. DPM_READ_INPUT works outside the cyclic process data exchange.
Every time a FALSE → TRUE edge is applied to input EN, DPM_READ_INPUT reads the data at its inputs and sends a corresponding request message to the Communication Module. Further FALSE → TRUE edges at input EN are ignored until the processing of the active requests is finished. The completion of the request processing is indicated by DONE = TRUE.