Siemens Simovert Masterdrives Compendium page 490

12.2010
Description of
functioning
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES
♦ P755: SIMOLINK configuration
If a 1 is set at the second position of the configuration parameter,
changeover between the two SIMOLINK boards can be enabled
during operation. This is only possible if the bus cycle time is the
same even if changeover is enabled during operation.
• xx0x: No changeover during operation (converter status °014)
• xx1x:
Changeover of synchronization and data transfer allowed
during operation
When two SIMOLINK boards are being operated in one unit, the active
board is used for data transfer (same as when only one board is
present). The passive board is initialized (SIMOLINK ring starts) and
sends the parameterized transmit data. Synchronization and data
transfer by the passive board is not possible. Transmit and read data
are the same for the active and passive SIMOLINK. Different
parameterizations of the two SIMOLINK boards are only possible in the
case of the following parameters:
♦ Node address (P740)
♦ Number of nodes (P743)
♦ Number of channels (P745)
♦ Bus cycle time (P746)
The 1st index is allocated to SLB1 (lower slot) and the 2nd index is
allocated to SLB2 (higher slot). Which of the two SLBs is the active one
is determined by the selection (P744).
The diagnostic parameter (P748) always indicates the data of the active
SIMOLINK.
If it has not been ensured by a master (e.g. SYMADYN D) that the two
SIMOLINK rings are working synchronously, it can be assumed that,
when a changeover is made to the passive SIMOLINK, there is no
synchronization at first. The drives are synchronous with the bus again
only after the synchronization time (at 5 kHz pulse frequency and 3.2
ms bus cycle time, maximum 7 sec.). In the case of applications where
synchronicity is an essential component of functioning, changeover
during operation should not be carried out.
Changeover during operation must be explicitly enabled by the user
(P755). In addition, changeover during operation is prevented if
synchronization to the previously passive SIMOLINK is not possible
because different bus cycle times (P746) have been selected.
Compendium Motion Control
Communication / SIMOLINK
8.3-19