mbusDataRequest (Function)

This function is used to request data from a wired M-Bus slave.

The slave information can be read with mbusRecordSlaveInfo.

The meter data can then be read using mbusRecordGetInfo.

Input:

handle : SYSHANDLE

A handle to the connection

pri_addr : INT default -1

The primary address for the slave. Use -1 to use the secondary address instead.

sec_addr : STRING

The secondary address for the slave. Used if the primary address is  -1.

Returns: INT

Declaration:

FUNCTION mbusDataRequest : INT;
VAR_INPUT
   handle   : SYSHANDLE;
   pri_addr : INT := -1;
   sec_addr : STRING;
END_VAR;

Example:

INCLUDE rtcu.inc
 
PROGRAM test;
VAR
   mb   : SYSHANDLE;
   rc   : INT;
   info : mbusRecordSlaveInfo;
END_VAR;
 
   ...
   // Open wired M-Bus interface @2400 baud
   rc := mbusOpen(handle := mb);
   ...
BEGIN
   // Request data from device
   rc := mbusDataRequest(handle := mb, pri_addr := 11);
   DebugFmt(message := "mbusDataRequest=\1", v1 := rc);
 
   info(handle:=mb);         
   IF info.ready THEN
      DebugFmt(message:="Info for \4:", v4:=info.id);
      DebugFmt(message:=" Enc:  \1", v1:=info.enc_state);
      DebugFmt(message:=" Man:  " + info.manufacturer);
      DebugFmt(message:=" Ver:  \1", v1:=info.version);
      DebugFmt(message:=" Med:  \1", v1:=info.medium);
      DebugFmt(message:=" AN :  \1", v1:=info.accessnumber);
      DebugFmt(message:=" Sta:  \1", v1:=info.status);
      DebugFmt(message:=" Addr: " + info.sec_addr);
      DebugFmt(message:=" Sig:  \1", v1:=info.signal);
   ELSE
      DebugMsg(message:="no response");
   END_IF;
   ...
END;
END_PROGRAM;