Table 6- 9 Transmittable Data Types For "Fetch Data" Request - Siemens Simatic S7-300 CP 341 User Manual

Communication via Function Blocks
6.4 Using the Function Blocks with the RK 512 Computer Connection
Parameters in the FB for data source (Partner CPU)
The following table lists the data types that can be transmitted.
Table 6- 9 Transmittable data types for "Fetch data" request
Source on the partner
CPU
Data block
Expanded data block
Bit memory
Inputs
Outputs
Counters
Timers
Information in the message frame header
The table below shows the information in the message frame header of the RK 512 message
frame.
Table 6- 10 Information in the RK 512 message frame header for "Fetch data" request
Source on the partner CPU
Data block
Expanded data block
Bit memory
Inputs
Outputs
Counters
Timers
Explanation of the abbreviations used:
S-DBNR: Source data block number
S-Offset: Source start address
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R_TYP R_NO
'D' 0 - 255
'X' 0 - 255
'M' irrelevant
'I' irrelevant
'Q' irrelevant
'C' irrelevant
'T' irrelevant
To the destination, your S7
automation system (local
CPU)
Data block
Data block
Data block
Data block
Data block
Data block
Data block
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
R_OFFSET (in bytes)
(This value is specified by the partner CPU.)
0 - 510
(only even-numbered values are appropriate!)
0 - 510
(only even-numbered values are appropriate!)
0 - 255
0 - 255
0 - 255
0 - 255
0 - 255
Message frame header, bytes
3/4 command type 5/6 S-DBNR/S-
ED DB/DW
EX DB/DW
EM Byte address
EE Byte address
EA Byte address
EC Counter no.
ET Timer number
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7/8 number in
offset
Words
Words
Bytes
Bytes
Bytes
Words
Words
Manual, 09/2008, A5E02191071-01