FB_LON_KL6401

This function block is used for sending / receiving LON SNVTs via Bus Terminal KL6401. An instance of this block is required for each terminal. One instance can send or receive up to 62 SNVTs.

The FB must be tied to the send/receive blocks via the VAR_IN_OUT structure stLON_Com stLON_Com.

	Restrictions Only one call per instance Call must be made once per PLC cycle Instance must be called in the same PLC task as the send and receive blocks assigned to it

Inputs

VAR_INPUT
  bResetMaxBuffer : BOOL;
  bDisabled       : BOOL := FALSE;;
END_VAR

Name	Type	Description
bResetMaxBuffer	BOOL	Deletes the value rMaxBuffer for the maximum utilization of the transmit buffer.
bDisabled	BOOL	TRUE = deselection of the function block.

Inputs/outputs

VAR_IN_OUT
  stParameter_IN         : ST_LON_Parameter_IN_36B;
  stParameter_OUT        : ST_LON_Parameter_OUT_36B;
  stLON_Com              : ST_LON_Communication;
END_VAR

Name	Type	Description
stParameter_IN	ST_LON_Parameter_IN_36B	Input variable of the hardware.
stParameter_OUT	ST_LON_Parameter_OUT_36B	Output variable of the hardware.
stLON_Com	ST_LON_Communication	This structure is used to link the function block with the send/receive blocks. The actual sending and receiving is realized in this function block. The transmit/receive blocks only deal with preparation/evaluation of the data.

Outputs

VAR_OUTPUT
  bReady      : BOOL;
  bBusy       : BOOL;
  bTimeOut    : BOOL;
  bError      : BOOL;
  eError      : E_LON_ERROR;
  dwErrorKL   : DWORD;
  byLONState  : BYTE;
  stKL6401    : ST_KL6401;
  arrNeuronID : ARRAY [0..5] OF BYTE;
  arrProgID   : ARRAY [0..7] OF BYTE;
  wFW         : WORD;
  byActBuffer : BYTE;
  rActBuffer  : REAL;
  rMaxBuffer  : REAL;
END_VAR

Name	Type	Description
bReady	BOOL	The initialization is complete.
bBusy	BOOL	The output is TRUE as long as values are sent.
bTimeOut	BOOL	Timeout during initialization.
bError	BOOL	This output goes TRUE as soon as an error occurs. This error is described via the eError variable.
eError	E_LON_ERROR	In the event of an error, the output issues an error code and bError becomes TRUE at the same time.
dwErrorKL	DWORD	Error ID of the function block. In this case the variable eError has the value "eKL6401_Error". bError goes TRUE at the same time.
byLONState	BYTE	LON state.
stKL6401	ST_KL6401	Structure for the configuration (for future applications).
arrNeuronID	ARRAY OF BYTE	Neuron ID of the terminal (supported since firmware 4C).
arrProgID	ARRAY OF BYTE	Program ID of the terminal (supported since firmware 4C).
wFW	WORD	Terminal firmware (supported since firmware 4C).
byActBuffer	BYTE	Number of instructions in the transmit buffer.
rActBuffer	REAL	Current utilization of the transmit buffer in percent.
rMaxBuffer	REAL	Maximum utilization of the transmit buffer in percent. The value can be reset with the input variable bResetMaxBuffer.

Requirements

Development Environment	TwinCAT 3 PLC library to be integrated
TwinCAT from v3.1.4020.14	Tc2_LON from 3.3.4.0