Sharp DP-750 Wartungshandbuch Seite 106

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Seitenansicht 105
106 • Programmable Field Bus Controller 750-833
Acyclic Communication According to DP/V1
WAGO-I/O-SYSTEM 750
Bus System
The error message “invalid slot“ is generated when addressing modules that
are neither physically nor virtually (projected as not being connected)
available.
When reading from indices (MSAC1/2_Read), the maximum PDU length that
can be set is 240 bytes. The bus coupler/controller returns the actual amount of
information from the respective index.
When writing to indices (MSAC1/2_Write), the maximum possible length of
information to be written to the respective index must not be exceeded.
Otherwise, the error message “invalid length while writing!“ is reported by
the bus coupler/controller.
Coding of Error Messages
Bit
7
Bit
7
Bit
7
Bit
7
Octet 1
Octet 3
Octet 4
Octet 2
Error_Frame
Error_Class
Error_Code_1
Error_Code_2
User specific
Error_Decode
Bit
6
Bit
6
Bit
6
Bit
6
Bit
5
Bit
5
Bit
5
Bit
5
Bit
4
Bit
4
Bit
4
Bit
4
Bit
3
Bit
3
Bit
3
Bit
3
Bit
2
Bit
2
Bit
2
Bit
2
Bit
1
Bit
1
Bit
1
Bit
1
Bit
0
Bit
0
Bit
0
Bit
0
Service
Abb. 3.10.2-13: Coding of error messages g012121e
Octet 2
Error Decode Meaning
0 ... 127 Reserved
128 PROFIBUS-DP/V1
129 ... 254 Reserved
255 PROFIBUS-FMS
Seitenansicht 105
1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 239 240

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