Fanuc Power Mate i-D/H Maintenance Manual

B63175EN/03
4. INTERFACE BETWEEN NC AND PMC
287
Input signals (M function, T function, etc.) from the CNC and those (cycle
start, feed hold, etc.) from the machine tool are sent to the PMC.
Signals for the CNC (cycle start, feed hold, etc.) and those for the machine
tool (tunret rotation, spindle stop, etc.) are output from the PMC.
Fig. 4.2.6 shows the relationship between these signals and the PMC.
Input signals are entered in the input memory of PMC and output signals
are issued from PMC.
As shown in Fig. 4.2.6, the input signals are synchronized only in the 2nd
level sequence part.
PMCCNC
MT
Input memory of CNC
Input signals from
CNC
Transmitted at the
start of 2nd level
Transmitted every 8 ms
Output memory of CNC
Output signals to
CNC
Output signals to
machine tool
Input signals from
machine tool
Transmitted
every 2 ms
2nd level synchronous
input signal memory
Input signals from
CNC
Input signals from
machine tool
Output signal memory
Output signals to the
machine
Input signals from
machine
Input signal memory
Sequence program
1st level
sequence part
2nd level
sequence part
Fig. 4.2.6 PMC I/O signals
4.2.6
Processing I/O Signals

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