Siemens SIMATIC S5 Manual page 171

S5-95U, SINEC L2
link_status Message in the Confirmation Header
Table 8-9. link_status Messages for the SRD Service
Value of Abbreviation
link_status (PROFIBUS)
08
H
0A
H
09
H
01
H
02
H
03
H
11
H
15
H
* SAP 64 is defined as the default SAP.
link_status Message in the Indication Header
Table 8-10. link_status Messages (Indications) for the SRD Service
Value of Abbreviation
link_status (PROFIBUS)
20
H
21
H
22 no_data
H
EWA 4NEB 812 6112-02
dl Positive acknowledgement for data sent; reply data with low
priority available
dh Positive acknowledgement for data sent; reply data with
high priority available
nr Positive acknowledgement for data sent; negative
acknowledgement for reply data
ue Negative acknowledgement; remote PLC is in the STOP mode
Prerequisite: Destination station is an S5-95U and the connection
has been properly configured at the destination station
Negative acknowledgement; resources of the remote FDL control
rr
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
lo The reply to this SRD transaction was made with low-
priority data
hi The reply to this SRD transaction was made with high-
priority data
No reply data were transmitted in connection with this SRD
transaction
Data Transmission by Accessing Layer 2 Services
Meaning
: destination SAP is not default SAP
*
: destination SAP is default SAP
*
Meaning
8-31