Siemens SIMATIC S5-115U User Manual page 447

S5-115U Manual
Meaning
Data ID "flag"
Flag byte no.
irrelevant
Meaning
Data ID "data"
Data block no.
Data word no.
* Destination addresses in the system data area
* * ASCII coded data ID
Overflow
If data packets are received that are longer than the Receive mailbox, writing does not extend
beyond the end of the Receive mailbox. There is no overflow signal.
The end of the receive area is flag byte 255 in the flag area or the last data word (in the data
block).
EWA 4NEB 811 6130-02b
Table 12-4. Assigning Parameters as a Flag Byte
Parameter
4D (M )
* *
H
0 to 255
Table 12-5. Assigning Parameters as a Data Byte
Parameter
44 (D )
* *
H
2 to 255
0 to 255
Communications Capabilities
Address
CBR CBS
EA74 EA77
EA75 EA78
EA76 EA79
Address
CBR CBS
EA74 EA77
EA75 EA78
EA76 EA79
*
SMB RMB
EA7A EA7D
EA7B EA7E
EA7C EA7F
*
SMB RMB
EA7A EA7D
EA7B EA7E
EA7C EA7F
12-13