F146_RECV

Receive data (MEWNET link)

This instruction receives data from another station through link units in the network.

Parameters

Input

s1_Control (DWORD): 32-bit area for storing control data
s2_AdrType (WORD, INT, UINT): Type of source operands for storing data in the target station. Be sure to select the area by setting the address 0 (e.g. DT0 or WR0, ...) (data area at the source station)
s2_AdrOffs (WORD, INT, UINT): Starting 16-bit area address for the source operand specified in s2_AdrType (data area at the source station)
d_Start (WORD, INT, UINT): Starting 16-bit area address for storing data received (data area at the target station), must be a constant

The variables s2_AdrType, s2_AdrOffs and d_Start have to be of the same data type.

Remarks

Specifications of s1_Control:

s1 higher byte	s1 lower byte

1. Link No. selection (LK: 1–3, the station itself)	1. Word unit send selection
Up to 3 link units can be connected to 1 CPU.	F = 0	Word unit selection
Up to 3 link units can be connected to 1 CPU.	n2 = 0	Set "0" when the word unit is selected
This (LK) selects the source link unit of the three.	n1 = 11–16	Specify the number of words to be sent
2. Link station No. selection (UN: 1–63, another station)	2. Bit unit send selection
Up to 63 stations can be connected to 1 link unit.	F = 1	Bit unit selection
This (UN) then selects the target station No.	n2 = 0–15	Destination bit No.
This (UN) then selects the target station No.	n1 = 0–15	Source bit No.

Tip

For detailed information, please refer to the relevant technical manual of the intelligent unit.

Example

POU header

All input and output variables used for programming this function have been declared in the POU header. The same POU header is used for all programming languages.

BODY
    WORKSPACE
        NETWORK_LIST_TYPE := NWTYPELD ;
        ACTIVE_NETWORK := 0 ;
    END_WORKSPACE
    NET_WORK
        NETWORK_TYPE := NWTYPELD ;
        NETWORK_LABEL :=  ;
        NETWORK_TITLE :=  ;
        NETWORK_HEIGHT := 8 ;
        NETWORK_BODY
B(B_VARIN,,control_value,7,3,9,5,);
B(B_VARIN,,start_address,7,4,9,6,);
B(B_VARIN,,offset,7,5,9,7,);
B(B_VARIN,,output_value,7,6,9,8,);
B(B_CONTACT,,start,3,2,5,4,);
B(B_F,F146_RECV!,Instance,9,1,17,8,,?DEN?Ds1_Control?Ds2_AdrType?Ds2_AdrOffs?Dd_Start?AENO);
L(1,3,3,3);
L(5,3,9,3);
L(1,0,1,8);
        END_NETWORK_BODY
    END_NET_WORK
END_BODY

POU body

When the variable start is set to TRUE, the function is carried out.

LD body

	VAR
		start: BOOL:=FALSE;
			(*activates the function*)
		control_value: DWORD:=0;
			(*32-bit area for storing
control data*)
		start_address: WORD:=0;
			(*Starting 16-bit area
address for the source
operand specified in s2*)
		output_value: WORD:=0;
			(*Starting 16-bit area
address for storing data
received*)
		offset: INT:=0;
	END_VAR

ST body

IF start then
    F146_RECV( s1_Control:= control_value, s2_AdrType:= start_address, n_AdrOffs:= offset,
              d_Start:= output_value);
END_IF;