Communication / CBC
03.2010
6SE7087-6QX70 (Version AL) Siemens AG
8.4-26
Compendium Motion Control
SIMOVERT MASTERDRIVES
Basic process-data processing consists of the two functions, "Receiving
process-data" (PZD receive) and "Sending process-data" (PZD send).
A total of 16 process-data words are possible from the
MASTERDRIVES units, both in the receive and in the send direction.
For each direction, therefore, a total of 4 CAN messages are needed
because each individual CAN telegram can only transfer 4 process-
data words. This means that 4 unambiguous CAN identifiers are
needed both for PZD send and PZD receive. As in parameter
processing, node addresses and a basic identifier are also defined in
order to achieve better communication.
A parameter on a gray background is only valid for MASTERDRIVES
with CU1, CU2 or CU3.
For the PZD receive function, the same PZD-receive basic identifier is
set for all units on the bus by means of CB parameter P712 / P697, "CB
parameter 2". Unique identification is achieved by means of the node
address in parameter P918, "CB bus address", which must be different
for each bus node. A total of 4 CAN identifiers are assigned.
*4
Node adress of the
drive (P918)
Basic identifier for
PZD-receive (P712 / P697)
PZD receive-1 (setpoints 1 .. 4)
+1
+2
PZD receive-3 (setpoints 9 .. 12)
+3
PZD receive-4 (setpoints 13 .. 16)
PZD receive-2 (setpoints 5 .. 8)
CAN identifier for the 1st PZD-receive CAN telegram (words 1 to 4):
(value in 712 /
P697
) + (value in P918)*4
CAN identifier for the 2nd PZD-receive CAN telegram (words 5 to 8):
(value in 712 /
P697
) + (value in P918)*4 + 1
CAN identifier for the 3rd PZD-receive CAN telegram (words 9 to 12):
(value in 712 /
P697
) + (value in P918)*4 + 2
CAN identifier for the 4th PZD-receive CAN telegram (words 13 to 16):
(value in 712 /
P697
) + (value in P918)*4 + 3
CAN identifiers for
process-data
processing
NOTE
PZD receive
