Siemens SIMATIC S5 CP 521 Manual page 154

CP 521
CP response to job B02B
Table 7-21.
Byte Value
0 5X
H
1 01
H
2 00
H
3 2B
H
4 00 ... 64
H H
5 Irrelevant
6 Irrelevant
7 Irrelevant
Final CP response
After the whole data message has been transferred from the CP 521 to the
peripheral device, the CPU receives a last message from the CP 521. This resets the
coordination bit.
Table 7-22.
Byte Value
0 5X
H
1 00
H
2 00
H
3 Irrelevant
4 00 ... 64
H H
5 Irrelevant
6 Irrelevant
7 Irrelevant
GWA 4NEB 812 6030-02b
H
Acknowledging the Last (43rd) Data Block
Meaning
Acknowledgement for job: Send data
"Send" coordination bit set if data valid
Coordination data valid
Number of the 43rd data block (max.)
Number of messages in receive buffer (max. 100)
Final Coordination Information
Meaning
Acknowledging the job: Send data
Coordination bit reset
Data valid
Number of messages in the receive buffer (max. 100)
ASCII Mode
7-31