Siemens SIMATIC S5 Manual page 157

S5-95U, SINEC L2
link_status Message in the Confirmation Header
Value of Abbreviation
link_status (PROFIBUS)
00
H
01
H
02
H
03
H
11
H
15
H
* SAP 64 is defined as the default SAP.
Invoking FB223 for SDA
OB1 (Sending PLC)
. .
. .
:JU FB 223
Name :SENDER
ANST : F 0.0
LSTA : FY 9
:
:
:BE
EWA 4NEB 812 6112-02
Table 8-5. link_status Message for SDA
ok Positive acknowledgement, service executed
ue Negative acknowledgement; remote PLC is in STOP mode
Prerequisite: Destination station is an S5-95U and the connection
has been properly configured at the destination station
rr Negative acknowledgement; resources of remote FDL control not
available
rs service_code or rem_add_station not activated at the remote
station
na No response from remote station or response not plausible
iv - Illegal parameters in the request header or
- Local station is passive or
- Destination station is own station address or
- If own SAP = default SAP
or
- own SAP default SAP
Send request and fetch confirmation ( section 8.4)
Send initiation bit for the SDN service
Flag byte contains the link_status of the confirmation
Data Transmission by Accessing Layer 2 Services
Meaning
: destination SAP is not default SAP
*
: destination SAP is default SAP
*
Explanation
8-17