Data Transmission by Accessing Layer 2 Services S5-95U, SINEC L2
Figure 8-11. Request and Confirmation Structures for the RUP_SINGLE Service
Request
com_class
FDL_Request=00
H
Byte
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User-definable ID
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8
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249
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4 Bits 0 to 3
0
irrelevant
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irrelevant
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a
7 rem_add_segment
Logical segment address;
always enter FF
H
Bits 4 to 7
service_class
Priority of
send message
low=0
H
or
high=1
H
Send data
(0 to 242 bytes)
Confirmation
com_class
Confirmation=01
H
Byte
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0
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a
1 user_id
ID assigned in connection with
a request
service_code
Type of service:
RUP_SINGLE=06
H
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2
link_status
( Table 8-7 )
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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 message
low=0
H
or
high=1
H
service_code
Type of service requested:
RUP_SINGLE=06
H
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a
Must be specified by the user in the request header
link_status Message in the Confirmation Header
Table 8-7. link_status Messages for the RUP_SINGLE Service
Value of
link_status
Meaning
Positive acknowledgement; data area loaded
Receive SAP not activated; receive SAP not equal to send SAP
Response resource being used at the moment by MAC
(temporary fault)
Illegal parameters in the request header
00
H
06
H
14
H
15
H
Abbreviation
(PROFIBUS)
ok
no
lr
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