Bosch Rexroth IndraDrive MPH-02 Functional Description page 681

MPH-02, MPB-02, MPD-02
Command Telegram
Reaction Telegram
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Handling, Diagnostic and Service Functions
Service 0x01 Canceling a Data Transmission
With this service it is possible to cancel a sequential telegram sequence.
The sequential telegram channel is unlocked with the "Canceling a data
transmission" service when the device address and the service to be
cancelled correspond with the sequential telegram sequence. When the
command telegram is transmitted without the device address and without
service to be cancelled, this service is always executed.
• Enter 0x01 in the service of the telegram header.
• Enter the service to be cancelled in the useful data.
If there isn't any error, the reaction telegram has the following structure:
telegram header
Fig. 10-62: Structure of the reaction telegram
In the case of an error, the useful data that contain the error code are
transmitted. The useful data header corresponds to the SIS specification.
telegram header
Fig. 10-63: Structure of the reaction telegram in the case of error
Note: When there wasn't any sequential telegram processed and
this service was transmitted nevertheless, there isn't any error
reaction telegram transmitted!
Service 0x80 Reading a Parameter
A one-time read access is completed with one transmission step. The
master enters the following information in the command telegram:
• In the control byte the desired element is selected in the bits 3 ... 5
("element"). Das Bit 2 wird auf "1" (letzte Übertragung) gesetzt.
• The device address is entered.
• Parameter type and number are entered.
• There aren't any useful data entered.
The answer to a read access contains the following data:
• In the Ctrl byte of the telegram header bit 4 is set to "1" in order to
identify it as a reaction telegram.
• The status byte of the useful data header contains the information
whether an error occurred during the processing of the command
telegram.
• The control byte is read from the command telegram and copied to the
reaction telegram.
• The device address is read from the command telegram and copied to
the reaction telegram.
• The requested data is written to the useful data.
useful data header
useful data header useful data
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