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commands immediately, whereas the limit switch response causes the controller to make a
decelerated stop.
NOTE: The effect of an Abort input is dependent on the state of the off-on-error function for
each axis. If the Off-On-Error function is enabled for any given axis, the motor for that axis will
be turned off when the abort signal is generated. This could cause the motor to 'coast' to a stop
since it is no longer under servo control. If the Off-On-Error function is disabled, the motor will
decelerate to a stop as fast as mechanically possible and the motor will remain in a servo state.
All motion programs that are currently running are terminated when a transition in the Abort input
is detected. For information on setting the Off-On-Error function, see the Command Reference,
OE.
Uncommitted Digital Inputs
The DMC-1600 has 8 opto-isolated inputs. These inputs can be read individually using the
function @IN[x] where x specifies the input number (1 thru 8). These inputs are uncommitted and
can allow the user to create conditional statements related to events external to the controller. For
example, the user may wish to have the x-axis motor move 1000 counts in the positive direction
when the logic state of IN1 goes high.
IN9-IN16
FLE,RLE,HOMEE
FLF,RLF,HOMEF
FLG,RLG,HOMEG
FLH,RLH,HOMEH
Note: When using the ICM-1100, the INCOM is different for IN9-IN16 from IN1-IN8.
A logic zero is generated when at least 1mA of current flows from the common to the input. A
positive voltage (with respect to the input) must be supplied at the common. This can be
accomplished by connecting a voltage in the range of +5V to +28V into INCOM of the input
circuitry from a separate power supply.
DMC-1610, 1620, 1630, 1640 controllers have 64 additional TTL I/O. The CO commands configures
each set of 8 I/O as inputs or outputs. The DMC-16X8 use two 50 pin headers which connect directly
via ribbon cable to an OPTO 22 (24 I/O) or Grayhill Opto rack (32 I/O).
The @ IN1 thru @ IN80 function checks the state of the inputs 1 thru 80.
Wiring the Optoisolated Inputs
Bi-Directional Capability.
All inputs can be used as active high or low - If you are using an isolated power supply you can
connect +5V to INCOM or supply the isolated ground to INCOM. Connecting +5V to INCOM
configures the inputs for active low. Connecting ground to INCOM configures the inputs for
active high.
The optoisolated inputs are configured into groups. For example, the general inputs, IN1-IN8,
and the ABORT input are one group. Figure 3.1 illustrates the internal circuitry. The INCOM
signal is a common connection for all of the inputs in this group.
34 • Chapter 3 Connecting Hardware
INCOM 2
LSCOM 2
DMC-1600
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