Data Transmission by Accessing Layer 2 Services S5-95U, SINEC L2
Invoking FB224 for SDA
OB1 (Receiving PLC) Explanation
. .
. .
:JU FB 224 Fetch indication ( section 8.4)
Name :EMPFANG
EMPF : F 0.1
Enable receive
:
:
:BE
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Storing Request and Confirmation at the Sender
DB33 Explanation
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0: KH = 0000; ****Request frame****
1: KY = 000,000; com_class / user_id
2: KY = 000,000; service_code / irrelevant
3: KY = 000,048; service_class/destination SAP
4: KY = 002,255; rem_add_station / rem_add_segm
5: KH = AAAA; Data bytes 1 and 2
6: KH = BBBB; Data bytes 3 and 4
7: KH = CCCC; Data bytes 5 and 6
8: KH = DDDD; Data bytes 7 and 8
9: KH = 0000; ****Confirmation frame****
10: KY = 001,000;
com_class / user_id
11: KY = 000,000; service_code / link_status
12: KY = 000,048; service_class / destination SAP
13: KY = 002,255; rem_add_station / rem_add_segm
14: KH = 0000;
Storing the Indication at the Receiver
DB34 Explanation
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8: KH = 0000;
9: KH = 0000;
****Indication frame****
10: KY = 002,000;
com_class / irrelevant
11: KY = 000,000; service_code / irrelevant
12: KY = 000,048; service_class / source SAP
13: KY = 001,255; rem_add_station / rem_add_segm
14: KH = AAAA; Receive data from sender
15: KH = BBBB; .
16: KH = CCCC; .
17: KH = DDDD; .
18: KH = 0000;
8-18
EWA 4NEB 812 6112-02
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