Delta MMC120 - Manual (Page 12)

Overview MMC120 Linear Motion Control Module
12 Delta Computer Systems, Inc. 360/254-8688
Bus Compatibility
ModConnect® Certified partners
Quantum Automation Series
Direct connection to Quantum backplane
4 input and 4 output registers, using 64 input and 64 output points
32 registers for parameter storage (16 per axis)
32 registers maximum for profile storage (16 per axis)
2048 registers maximum for event steps (256 steps)
Fail Safe Timers
The MMC120 has two fail safe timers:
Drive Output Disable -- 15 microseconds
The fastest fail safe timer on the MMC120 is 15 microseconds long and is retriggered by activity on the
module's internal bus. If the timer is not retriggered within 15 microseconds, it disables the drive outputs.
When internal bus activity resumes, the drive outputs are re-enabled.
Hardware Reset -- 17 milliseconds
If the microprocessor fails to retrigger the onboard watchdog timer, the 17 millisecond hardware reset timer
expires and resets the hardware. This has the same effect on the MMC120 as powering up. While the module
is being reset, the Fail LED on the front panel is illuminated.