Fagor DDS APS-24, Hardware Manual

Page: 302 / 406

   Installation
8.
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Ref.1912
DDS
HARDWARE
Line terminating resistor (RT)
After connecting the modules, make sure that the external elements
connected to the bus have their terminating resistor RT activated.
The CNC (or the ESA panel), located at the end of the bus always has the
line terminating resistor activated. See figure
F. H8/39 .
Transmission speed selection
From version 07.02, 08.01 and newer, the drive may have a CAN card capable
of transmitting data at 1 MB, 800 kBd or 500 kBd.
In this data transmission, each drive can receive and transmit 4 IDns (CAN
identifiers) or 4 Words (64 bits) through the fast channel.
The communication speed between all the drives being governed by the CNC
in the CAN bus is selected by hardware using the “boot” button on top of the
CANcard connector. See figure
F. H8/41 .
The parameter associated with the communication speed selection of the
CAN bus is QP11 and every time a speed is selected, this parameter is
associated the corresponding value. See table
T. H8/5 that shows the
possible baudrate values that will be shown on the drive display. Chapter 12
of the “man_dds_soft.pdf” manual explains the meaning of parameter QP11.
F. H8/40
Minimum bending radius of the CAN cable.
NOTE. The RT switch (located under the CAN connector) of the last drive
(usually the one farthest away from the CNC) must be activated (position
1
 switch down) and the rest of the drives connected to the bus must be
deactivated (position 0

switch up).
NOTE. This card is not compatible with drive software versions older than
07.02. See chapter 13. COMPATIBILITY .
NOTE. Consequently, the serial connection will no longer be necessary to
select the transmission speed.
F. H8/41
Location of the “BOOT” button at the drive.
Node selector
“BOOT” BUTTON
X5
Status display
X6
1
1
9
CAN connector
Line terminating resistor
activating switch
RS-232 line connector