Siemens SIMOVERT MASTERDRIVES Manual page 450

Communication / SIMOLINK
Communication
Parameterization of
the dispatcher
NOTE
8.3-22
The 3 SIMOLINK interfaces must be parameterized as follows for
transmitting the process data:
♦ SLB in master drive 1 (dispatcher)
The following 5 process data have to be transferred (written):
• STW_2 = control word for drive 2
• STW_3 = control word for drive 3
• s
= position setpoint
set
• n
= speed setpoint
act
• a
= acceleration setpoint
act
5 telegrams (= 5 channels) are required for this.
♦ SLB in slave drive 2 (transceiver)
One item of process data is transferred in ZW_2 (written).
For this, one telegram (= 1 channel) is required.
ZW_2 = status word of drive 2
♦ SLB in slave drive 3 (transceiver)
One item of process data is transferred in ZW_3 (written).
For this, one telegram (= 1 channel) is required.
ZW_3 = status word of drive 3
The following parameter settings are of significance for the dispatcher
as the master drive:
♦ P740 = 0
(Dispatcher function)
♦ P745 = 5
(SLB channel number)
This means that each node is provided with five telegrams for
writing.
The setting always depends on the requirements of the node with the
largest required number of channels. In this example, this is the
dispatcher (master drive 1) with five telegrams.
♦ P746 = 1 ms (SLB cycle time)
A sufficient number of additional telegrams are automatically added
to non-addressed nodes as is required to achieve this cycle time.
Synchronization of the control loops in the converter via the bus
cycle time: The bus cycle time must be in a defined relation to the
time slots of the individual controls for synchronization of the
decentralized lower-level control loops in the converters. The
following is applicable for the time slots on MASTERDRIVES units:
• Current control in time slot T
• Speed control from V1.30 in time slot T
• Position control in time slot 4 T
0
from V2.00 in time slot T
0
6SE7087-6QX70 (Version AG)
Compendium Motion Control
05.2006
= 2 T
1 0
0
Siemens AG
SIMOVERT MASTERDRIVES