Motion MMI-8S - Manual (Page 20)

I/O Function. The Cybernetic User Bits are available at the CI cable connectors and can be used
as either inputs or outputs dependent on the command. Note that an output can only drive LEDs
such as those in Solid-State relays or optical isolation. An input can only be a passive switch or
isolated relay contact across the User Bit and User ground. Connecting any device, at a different
potential, to this system through the User Bits, WILL damage the User port; opto-isolation is
required. The standard CI cable is the 20 pin which provides limits and home sensor signals,
access to the User Bit I/O lines, and VCC power & ground. Refer to Appendix A of this manual.
Other Functions. The Jog function (pin 6) is available at the Jog connector of the CI Cable; see
Appendix A. External thumbwheel (pin 12) is not used. Instead refer to the I/O Path option for
thumbwheel operation or stand-alone (PLC) mode. Note that the CW-CCW inputs are available in
this system as the Emergency Stop option. Also, the Inhibit / Abort (pin 8) is not used in this
system. This Abort is not the same as the driver abort (ABR).
Reserved User Bits.
B 0
Enable Driver; must be LO to step. B0 LED will be ON.
B 1 Bit 1 is always the Home Sensor.
B 6 Bit 6 Is the Busy Bit (CTS). See mOde Command.
LED Status Displays.
OFF = Logic High or true ON = Low or false; pin # refers to CY 545 pinout.
BZ Indicates the inverse of pin 27(User Bit 6) Off = Ready;On = Busy
DR Indicates the polarity of pin 2 (direction) LO = CW
ST Indicates the polarity of pin 1 (step) LO = Step pulse
PW Indicates the polarity of pin 3 (stop) LO = Stepping
SW Indicates the polarity of pin 6 (slew) LO = Ramp speed
B0 Indicates the polarity of pin 21 (User Bit 0)
LO = Enable all drivers
B1 Indicates the polarity of pin 22 (User Bit 1) LO = Home Sensor blocked
B2 Indicates the polarity of pin 23 (User Bit 2) General Purpose User Bit
Reset. To hardware reset or stop the system, cycle the AC power switch located on the rear
panel.
Software Configuration
This system is a serial device directed by ASCI character commands. It is configured exactly as
described in the Cybernetics controller manuals; except for differences as noted in this manual.
Special Commands are created to simplify use of the Basic program.