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12 • Chapter 2 Getting Started DMC-1700/1800
DMC-1780 allows the user to select which channel will be used. The DMA channel chosen should be
reflected within the Galil software registry. 2.5 illustrates these settings.
Please note earlier controller revisions (Rev. E and earlier for DMC-1740, Rev. C and earlier for
DMC-1780) did not have hardware jumpers for DMA channel selection.
DR
Q
DAC
K
0
DR
Q
DAC
K
Setting for DMA channel 1 Setting for DMA channel 0
1
1 0
Figure 2.5 - Jumper settings for DMC-1700 DMA
(Optional) IRQ (Interrupt) Jumpers
IRQ jumpers are not necessary for communication with the Galil controllers. Rather, they are an
option that may be used for notifying the PC of events that occur on the motion controller. The
selectable IRQ jumpers are only available on the DMC-1700. The PCI drivers for the DMC-1800 will
automatically assign it an IRQ based on system availability.
On the DMC-1700, select which IRQ line will be used when the controller needs to notify the PC of an
interrupt. You will need to select an IRQ line which is open on your PC, meaning not shared with any
other device. Within the Galil Software Registry, the corresponding IRQ line should be entered into
the controller registry information.
NOTE: For Version 7 Drivers and ISA/PC-104 controllers with new firmware, a jumper MUST
be installed on one of the IRQ jumper pins in order to use Interrupt Communication (the default
method of communication). Match the IRQ jumper on the board with an IRQ Setting that
displays “No Conflicts” in the Device Manager.
If No IRQ lines are available or Interrupt Communication is not desired, the user must go to the
“Controller Registration” menu and uncheck the “Interrupt Communication” method. Stall or
Delay methods of communication will then be used. A Communication Timeout error will occur
if this is not done.
(Optional) Motor Off Jumpers
The state of the motor upon power up may be selected with the placement of a hardware jumper on the
controller. With a jumper installed at the MO location, the controller will be powered up in the ‘motor
off’ state. The SH command will need to be issued in order for the motor to be enabled. With no
jumper installed, the controller will immediately enable the motor upon power up. The MO command
will need to be issued to turn the motor off.
The MO jumper is always located on the same block of jumpers as the stepper motor jumpers (SM).
This feature is only available to newer revision controllers (Rev. F and later for DMC-1740, Rev. D
and later for DMC-1780, Rev. C and later for DMC-1840). Please consult Galil for adding this
functionality to older revision controllers.