Communication / CBC CANopen Communication Board 02.2004
6SE7087-6QX70 (Version AD) Siemens AG
8.5-30 Compendium Motion Control SIMOVERT MASTERDRIVES
Parameters are stored on the CBC for DSP 402 objects which supply
actual values. These are read out in the case of an SDO read task.
Nothing needs to be "wired up" for these.
If an object is transferred as a PDO as a result of the predefined
mapping table, the value converted or processed for the MC may
emerge at the connector number of the dual port RAM specified in the
table. This connector must in turn be "wired" to the right location in
MASTERDRIVES. If an object is mapped to a PDO and thereby
transferred via the dual port RAM, then it can also be written by means
of an SDO task.
All parameter values modified by means of profile-specific objects are
saved only to the RAM in MASTERDRIVES. If the control board of the
MASTERDRIVES system is disconnected from the supply voltage, the
values from the EEPROM are stored in the parameters and in the
relevant objects when the supply is connected again. The R_PDO
values are all set to zero.
To restore the object values as they were before the supply was
disconnected, the objects must be written with their PDO or SDO tasks.
Some objects are linked to parameters in the MASTERDRIVES. The
CBC uses a parameter task to read or write them.
However, some parameters can be written only when the converter is in
particular states.
If you want write an object that is linked to a parameter that can only be
written in the "ready to start" state during operation via the CAN bus, an
SDO abort is returned in response to the SDO task. The different SDO
aborts are described in the following table.
CAUTION
SDO aborts
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