Mitsubishi Electric MELDAS C6 Interface Manual page 279

B con-
Signal name
tact
—
GEAR SHIFT FINISH
[Function]
This signal changes the spindle speed to the speed (S command) specified in the machining
program.
This signal is used to smoothly perform the spindle speed (S analog, etc.) control.
[Operation]
To change the spindle speed to the speed specified by the S command during automatic operation
(memory or MDI), it is needed to turn ON the "Gear shift finish (GFIN)" signal, or "M function finish 1
(FIN1, FIN2)" signal.
S command
Rising edge of GFIN, FIN1, or FIN2
When using the "Gear shift finish" signal, the following two conditions should be considered:
Whether gear shift (gear change) is applicable (whether there are two or more states of gear
shift).
Whether "spindle up-to-speed" signal output from the spindle controller is used for verification of
spindle speed.
Operation example (1) There is no gear shift and the "Spindle up-to-speed" signal is not used.
Command program
S function strobe (SFn)
M function finish (FIN1)
Spindle speed
Operation example (2) There is no gear shift, but the "Spindle up-to-speed" signal is used.
Command program
S function strobe (SFn)
Gear shift finish (GFIN)
M function finish (FIN1)
Spindle up-to-speed signal
Spindle speed
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
GFIN
+
6-3-82
1st spindle 2nd spindle
YD26 YD56
Spindle command speed
S100 Next block
Next block
S100
3rd spindle
YD86
Spindle