OMS MAXnet, User Manual

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LIMIT INPUTS CONTROL SIGNAL INTERFACE
MAXnet User’s Manual
4-3
4.2. LIMIT INPUTS
To facilitate system safety, TTL inputs for +/- limit conditions are provided for each axis. Limits
may be activated by mechanical switches using contact closures or other suitable active
switches, such as a Hall Effect switch or opto-isolator that connects to ground.
If the motor travels beyond its allowable limits and trips the switch, the limit condition removes
any further excitation in the limit direction from the affected axis. (Servo Motor systems should be
designed for safety, i.e. to have electrical braking to stop them). The limit switch active signal
state can be selected with the LT command on an axis by axis basis. The behavior of the limit
functionality can be set for the axis to decelerate to a stop or to stop without deceleration when a
limit condition occurs.
See Command Reference Manual: MAX Family ( 4.3. HOME
INPUTS
To facilitate positioning of an axis to a known reference position, a TTL home input is provided for
each axis. For axes using an encoder, the home input can be used in conjunction with the index
signal of the encoder. The logic of the encoder signals Phase A/Phase B/Index that constitute a
true home condition is programmable. Refer to
Figure 4-3 .
): EH, HM, HR, HT,
KM, and KR commands.
4.4. GENERAL PURPOSE DIGITAL I/O
There are up to 16

general purpose digital lines that can be individually configured as either a
TTL input or an active drive TTL output. Commands are provided for setting the I/O direction of
the lines, setting the state of the outputs and reading the current state of the I/O lines. Inputs can
be used to control loops, qualify motion or signal an event.
Reference Command ): BD, BH, BL, BW,
BX, IOK, and SW commands.
4.5. ANALOG I/O
4.5.1. ANALOG INPUTS
Up to 4* general purpose analog inputs are available to read +/-10V values via 16-bit analog to
digital converters. These can be used to provide input from analog sensors to application
software. Analog inputs can also be configured to provide a velocity override input.
See Command Reference Manual: MAX Family ( commands.

The MAXnet controller has 8 GPIO and 2 GP analog inputs. With the MAXnet expansion board used for 6 -
10 axes of motion, MAXnet has 16 GPIO and 4 GP analog inputs. MAXnet can also be customized for other
I/O solutions with the MAXnet expansion board.