Programming FCs (Functions) and FBs for S7 Ethernet CPs

Explanation of the Formal Parameters

The following table explains all the formal parameters for the AG_RECV / AG_LRECV function.

Parameter

Declara-

Type

Possible

Remarks

 

tion

 

Values

 

 

 

 

 

 

ID

INPUT

INT

1,2...16

The connection number of the ISO transport

 

 

 

 

connection is specified in the ID parameter (see

 

 

 

 

Configuration Section 4.3.1)

 

 

 

 

 

LADDR

INPUT

WORD

 

Module base address

 

 

 

 

When you configure the CP with STEP 7

 

 

 

 

hardware configuration, the module base

 

 

 

 

address is displayed in the configuration table.

 

 

 

 

Specify this address here.

 

 

 

 

 

RECV

INPUT

ANY

 

Specifies the address and length.

 

 

 

 

The address of the data area refers to one of

 

 

 

 

the following:

 

 

 

 

– Process image area

 

 

 

 

– Bit memory

 

 

 

 

– Data block area

 

 

 

 

Note on length:

 

 

 

 

Performance is improved in transfer of data

 

 

 

 

records up to 212 bytes if you also restrict the

 

 

 

 

length to 212 with the RECV parameter.

 

 

 

 

 

NDR

OUTPUT

BOOL

0: –

This parameter indicates whether new data

 

 

 

1: new data

were received.

 

 

 

 

For the meaning of this parameter in

 

 

 

 

conjunction with the ERROR and STATUS

 

 

 

 

parameters, refer to the following table.

 

 

 

 

 

ERROR

OUTPUT

BOOL

0: –

Error code

 

 

 

1: error

For the meaning of this parameter in

 

 

 

 

conjunction with the DONE and STATUS

 

 

 

 

parameters, refer to the following table.

 

 

 

 

 

STATUS

OUTPUT

WORD

see following

Status code

 

 

 

table

For the meaning of this parameter in

 

 

 

 

conjunction with the NDR and ERROR

 

 

 

 

parameters, refer to the following table.

 

 

 

 

 

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SIMATIC NET NCM S7 for Industrial Ethernet

C79000-G8976-C129–06

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Image 164
Siemens S7 appendix Recv Input ANY, NDR Output Bool, Status Output Word

S7 specifications

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