Parameters For L2-Send And L2-Receive - Siemens SIMATIC S5 Manual

Integral Standard Function Blocks L2-SEND and L2-RECEIVE
5.1

Parameters for L2-SEND and L2-RECEIVE

Function blocks L2-SEND and L2-RECEIVE use the parameters listed in Tables 5-1 and 5-2.
Table 5-1. A List of Parameters Used by L2-SEND (FB252)
Designation
A-NR
QTYP
DBNR
QANF
QLAE
Table 5-2. A List of Parameters Used by L2-RECEIVE (FB253)
Designation
A-NR
ZTYP
DBNR
ZANF
ZLAE
The job number specifies the following:
• The type of communication service (as listed in Table 5-3)
• With PLC to PLC connection:
- in L2-SEND, to which station the data are transmitted
- in L2-RECEIVE, from which station the received data were transmitted.
• With layer 2 accesses
- in L2-SEND, which layer 2 access is used for sending data
- in L2-RECEIVE, which layer 2 access is used for receiving data
Job Number
1 to 31
33 to 54, 64
133 to 154, 164
200
202
5-2
:
:
:
:
:
:
:
:
:
:
Table 5-3 Allocation of the Job Numbers
Allocated to Type of Communication
Transmitting and receiving via PLC to PLC connections
Transmitting the request and fetching the confirmation using the layer 2
access
Fetching the indication when using layer 2 access
Service and diagnostics functions with FMA services
Fetching the ZP slave life list for ZP master with cyclic I/O
Significance
Job number
Type of data source
Data block number
Data block start address of source data area
Length of source data
Significance
Job number
Type of data destination
Data block number
Data block start address of destination data area
Length of destination data
S5-95U, SINEC L2
EWA 4NEB 812 6112-02