Siemens Simovert Masterdrives Compendium page 484

12.2010
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES
♦ P 751: Source SLB transmit data
Used to select the connectors to be transmitted via SLB channels 1
to 8 (subdivided into low-word and high-word). Double connectors
must be entered in two consecutive indices, so that they are
transmitted with the full resolution.
♦ P 755: SIMOLINK configuration (dispatcher)
When data are transferred from one slave to another, the problem
arises that the dead time on the bus depends on the node address
of the transceiver. Specifically, this means that data transfer from
slave 2 to slave 1 via the dispatcher takes one cycle time longer
than data transfer between slave 1 and slave 2. The reason for this
is that the data are collected by the dispatcher and are not
transmitted onward until the next cycle. This problem can be
eliminated by addressing each transceiver twice in one SLB cycle, a
first time to obtain the current data of the transceiver which are then
available in the dispatcher, and a second time to transmit that data
onward, although the number of addressable nodes are thereby
reduced by half.
Parameter values (only dispatcher):
• xxx0:
No dead time compensation
• xxx1: Dead time compensation activated → Number of
addressable nodes = n / 2
When 2 SIMOLINKs are operated in a converter, data adoption and
synchronization can be changed over from one to the other (cf. P
744). If this changeover is also to be possible during operation
(converter status °014), this is to be enabled by the user. This
function is only provided in the case of MASTERDRIVES MC units.
Parameter values:
• xx0x: No changeover during operation (converter status °014)
• xx1x:
Changeover of synchronization and data transfer allowed
during operation
In the case of operation in a ring with a master which triggers the
bus cycle externally (e.g. SIMADYN D), the MASTERDRIVES
slaves are to be configured for exact adherence to the bus cycle
time. Otherwise, it is assumed internally that the bus cycle time is
determined by the particular number of telegrams. The actual bus
cycle time does not then correspond exactly to the time which has
been set. This function is only provided in the case of units which
can be synchronized (MASTERDRIVES MC).
Parameter values:
• x0xx:
Bus cycle time corresponding to the calculated number
of telegrams (normal operation)
• x1xx:
Exact adherence to the set bus cycle time
Compendium Motion Control
Communication / SIMOLINK
8.3-13