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Siemens SINEC L2 User Manual

Siemens SINEC L2
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Data Transmission by Accessing Layer 2 Services S5-95U, SINEC L2
Figure 8-9 shows the request, confirmation and indication structures for the SDN service
Figure 8-9. Structure of Requests, Confirmations and Indications for the SDN Service
rem_add_segment
Logical segment address;
always enter FF
H
rem_add_station
Address of the destination
station (1 to 126 or 127 for
multicast)
Destination SAP 0 to 62,
FF (=default SAP 64)
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a
Request
com_class
FDL_Request=00
H
Byte
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0
Confirmation
com_class
Confirmation=01
H
Byte
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0
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1 user_id
ID assigned in connection with
a request
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1
Indication
com_class
Indication=02
H
Byte
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1
irrelevant
user_id
User-definable ID
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8
.
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.
249
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4 Bits 0 to 3
0
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7
Bits 4 to 7
service_class
Priority of
send frame
low=0
H
or
high=1
H
Send data
(0 to 242 bytes)
service_code
Type of service:
SDN=01
H
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2
link_status
( Table 8-6 )
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4
Destination SAP 0 to 62,
FF (=default SAP 64)
rem_add_station
Address of the destination
station (1 to 126)
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7 rem_add_segment
Logical segment address;
is always FF
H
Bits 0 to 3
0
Bits 4 to 7
service_class
Priority of the
send frame
low=0
H
or
high=1
H
service_code
Type of service requested:
SDN=01
H
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2
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a
3
irrelevant
service_code
Type of service: SDN=01
H
or
SDN
Multicast
=7F
H
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2
irrelevant
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3
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4
Source SAP 0 to 62,
FF (=default SAP 64)
rem_add_station
Address of source station
(1 to 126)
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6
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a
7 rem_add_segment
Logical segment address;
is always FF
H
Bits 0 to 3
0
Bits 4 to 7
service_class
priority of
receive frame
low=0
H
or
high=1
H
Receive data
(0 to 242 bytes)
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8
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.
.
249
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Must be specified by the user in the request header
8-20
EWA 4NEB 812 6112-02

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Siemens SINEC L2 Specifications

General IconGeneral
BrandSiemens
ModelSINEC L2
CategoryController
LanguageEnglish

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