103
Command / Response Reference
Section 5-2
Parameters Data specifier code (command)
Defines the data to be retrieved from the Unit. Always set to 81 FF 00 (Hex).
Slave station address (command)
Defines the slave station network address. Set to 00 ~ 7D (Hex).
Number of items to read (command)
Defines the number of bytes to read. Set to 1 ~ F4 (Hex).
Response Codes
The following end codes can be returned by the Unit in response to the RUN
command:
5-2-2 RUN (0401)
Initiates a state changes within the PROFIBUS-DP Master Unit. This com-
mand will enable a pre-allocated slave station in the PROFIBUS-DP Master
Unit. The targeted slave station will be added to the Unit’s list of active sta-
tions and will be parameterized by the Unit.
The configured slave stations are by default enabled, but can temporarily be
disabled, i.e. removed from the active station list (see
5-2-3 STOP (0402)
).
The targeted slave station is defined by the station code in the command.
Command Format
Response Format
Parameters Station code (command)
Defines the slave station to be enabled state as follows:
High byte: Always set to 81(Hex).
Low byte: 00 ~ 7D (Hex): Defines the slave station network address.
Mode (command)
Always set to 01 (Hex).
Response code Description
0000 Normal.
0203 Slave station not allocated to the PROFIBUS-DP Master.
0402 Service not supported by Unit model / version.
1001 Command too large.
1002 Command too short.
110C • Invalid start address code word (non-specified code used).
• Invalid target slave address (exceeds 125).
2208 Unit is not in correct mode, e.g. it is in OFF-LINE or STOP
mode.
0104
Station
code
Command
code
Mode
0104
End codeCommand
code
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