Yaskawa YASNAC PC NC I/O Signal Function Manual - Manual (Page 88)

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YASNAC PCNC I/O Signal Function Manual Chapter 10: Safety and Maintenance Functions
10.1 Machine Ready Input Signal
This input signal indicates that the external power circuit is ready for operation.
The MRD input signal should be “closed” when machine side preparation (hydraulic pressure,
lubricating oil pressure, coolant pressure, etc.) is ready with the PCNC side ready for operation.
After power ON, when the MRD input signal is “closed” after the servo power ON input (SVMX)
and the brake release input (BRX) form the CNC have been opened, the PCNC gets ready for
operation and the “RDY’ message is displayed on the screen.
If the MRD input signal is “opened” when the PCNC is in the ready state, it enters the alarm state
(alarm 2190: MACHINE NOT READY) and the operation is stopped.
Machine Ready Input Signal MRD #30040