Siemens SIMATIC S5 Manual page 172

Data Transmission by Accessing Layer 2 Services
Invoking FB223 for SRD
OB1 (Sending PLC)
. .
. .
:JU FB 223
Name :SENDER
ANST : F 0.0
LSTA : FY 9
:
:
:BE
Invoking FB223 and FB224 for the RUP_SINGLE and/or RUP_MULTIPLE Service in the
Receiving PLC (to hold data ready for fetching)
OB1 (Receiving PLC)
. .
. .
:JU FB 223
Name :SENDER
ANST : F 0.0
LSTA : FY 9
:
:JU FB 224
Name :EMPFANG
EMPF : F 0.1
:
:BE
8-32
Send request and fetch confirmation ( section 8.4)
Send initiation bit for the SRD service
Flag byte contains the link_status of the confirmation
Send request and fetch confirmation ( section 8.4)
Send initiation bit for the RUP_SINGLE and/or
RUP_MULTIPLE service
Flag byte contains the link_status of the confirmation
Fetch INDICATION of the SRD service
Enable receive
S5-95U, SINEC L2
Explanation
Explanation
EWA 4NEB 812 6112-02