DPM_READ_OUTPUT¶
| Parameter | Value |
|---|---|
| Library_File_Name | PROFIBUS_AC500_V25.lib |
| Firmware | V2.5 |
| Type | Type_Function_Block_History |
| Group | Data |
The Function Block DPM_READ_OUTPUT implements the acyclic PROFIBUS DP function DDLM_RD_Outp which can be used to read output data of a slave. Using this function the master can also read output data of slaves which are assigned to other masters. Write access to output data of these slaves is not possible. DPM_READ_OUTPUT works outside the cyclic process data exchange.
Every time a FALSE → TRUE edge is applied to input EN, DPM_READ_OUTPUT 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.