Ethernet Communication (ISO on TCP) between SIMATIC S5 and
SIMATIC S7-1500 Controllers
Entry-ID: 109482475, V1.2, 07/2019
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DB 113 (ComFetchDB)
DW0 := "A1A1” deletion identifier or
:= "1234” data identifier
DW1 := "0235” current count value
DB 114 (ComWriteDB)
DW0 := "A1A1” deletion identifier or
:= "1234” data identifier
DW1 := "0234” current count value
The data blocks for FETCH (ComFetchDB) and WRITE (ComWriteDB) access
operations must not be configured to "Optimized block access” in the S7-1500.
(Properties of the data block under Options > "Attributes”).
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