Bosch Rexroth IndraDrive MPH-02 Functional Description page 679

MPH-02, MPB-02, MPD-02
Read Access
Sequential Telegram Access
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Handling, Diagnostic and Service Functions
Communication via SIS Protocol
Addressing a Drive
In the case of communication with SIS protocols we distinguish between
command telegrams and reaction telegrams, according to the direction of
transmission. A node can only be addressed under its address (see
program module) when a specific telegram format (frame) is observed.
Note: Only when the drive has received at least one valid SIS
telegram is
communication.
When the reading of a parameter is started in a command telegram, a
check is run in the drive to determine whether a sequential telegram is
required. In this case, bit 2 (current/last transmission) is kept at "0" in the
control byte of the reaction telegram until the last reaction telegram is
sent. In the last reaction telegram, bit 2 is set to "1".
The sending of a sequential reaction telegram is activated by the repeated
sending of the unchanged command telegram.
When the writing or reading of a parameter with sequential telegrams was
started in the drive, it is necessary to complete or cancel this process
before another service with sequential telegrams can be started. If
another service was started nevertheless, the "0x800C unauthorized
access" error code is sent in the reaction telegram. The service with
sequential telegram started before can then be normally processed or
cancelled with the next command telegram.
the SIS channel enabled
10-97
for further