S5-95U, SINEC L2 Data Transmission by Accessing Layer 2 Services
Invoking FB223 and FB224 with the RUP_SINGLE Service in the Receiving PLC
(holds data ready for fetching)
OB1 (Receiving PLC) Explanation
. .
. .
:JU FB 223
Send request and fetch confirmation ( section 8.4)
Name :SENDER
ANST : F 0.0
Send initiation bit for the RUP_SINGLE service
LSTA : FY 9 Flag byte contains the link_status of the confirmation
:
:JU FB 224
Fetch INDICATION of the SRD service
Name :EMPFANG
EMPF : F 0.1
Enable receive
:
:
:BE
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Invoking FB223 with the SRD Service in the Sending PLC (to fetch the data)
OB1 (Sending PLC) Explanation
. .
. .
:JU FB 223
Send request and fetch confirmation ( section 8.4)
Name :SENDER
ANST : F 0.0
Send initiation bit for the SRD service
LSTA : FY 9 Flag byte contains the link_status of the confirmation
:
:
:BE
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Storing Request and Confirmation at the Receiver Using the RUP_SINGLE Service
(holding data ready for fetching)
DB33 Explanation
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0: KH = 0000; ****Request frame, RUP_SINGLE service****
1: KY = 000,000; com_class / user_id
2: KY = 006,000; service_code / irrelevant
3: KY = 000,000; service_class / irrelevant
4: KY = 000,000; irrelevant / rem_add_segm
5: KH = 1111; Data bytes 1 and 2
6: KH = 2222; Data bytes 3 and 4
7: KH = 3333; Data bytes 5 and 6
8: KH = 4444; Data bytes 7 and 8
9: KH = 0000; ***Confirmation frame, RUP_SINGLE service***
10: KY = 001,000; com_class / user_id
11: KY = 006,000; service_code / link_status
12: KY = 000,000; service_class / irrelevant
13: KY = 000,255; irrelevant / rem_add_segm
14: KH = 0000;
EWA 4NEB 812 6112-02
8-25
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