Siemens SIMATIC S5 Manual page 23

2 Engineering
FB99 (CLOCK)
The block generates a clock of 1 second for time-controlled triggering of the
FETCH and WRITE jobs in the FET_WRI (FB40) block.
DB70 (FET_WRI)
The data block contains the parameters for indirect addressing of the active
FETCH and WRITE functions. The data block with the indirect addressing is
required in FB 40 for calling the HTB FETCH and SEND (R/W).
Table 2-8
Parameter area
FETCH parameter
WRITE parameter
Figure 2-1
Ethernet Communication (ISO on TCP) between SIMATIC S5 and
SIMATIC S7-1500 Controllers
Entry-ID: 109482475, V1.2,
Start address
as of DW 0
as of DW 10
07/2019
Source parameter
Area to be read in Destination data
the S7-1500 CPU area in the S5-CPU
(here DB 113, as of (here DB 113, as of
byte 0, length of 50 byte 0, length of 50
bytes) bytes)
Data area to be read Destination data
in the S5 area in the S7-CPU
(here DB 114, as of (here DB 114, as of
byte 0, length of 50 byte 0, length of 50
bytes) bytes)
Destination
parameter
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