Mitsubishi Electric MELDAS C6 Interface Manual page 150

B con-
Signal name
tact
—
SPINDLE GEAR SHIFT
[Function]
This signal informs which gear stage in the spindle applies to the S command (S code) issued in the
automatic operation (memory, MDI) machining program.
For machines that have gear stage shift, the gear will be shifted on the machine side when this
signal is received.
[Operation]
When the S command (S code) is issued in automatic operation, the gear stage for the commanded
S code is output with a 2-bit (GR1, GR2) code from the preset parameters (spindle max. speed).
The relation of the spindle max. speed parameter (Smax1 to Smax4) and the spindle gear shift
command (GR1, GR2) signal output is shown below.
Gear Max. spindle
stage speed
1 Smax 1
2 Smax 2
3 Smax 3
4 Smax 4
This signal (GR1, GR2) is output simultaneously with the spindle function strobe (SFn).
(Note 1) If the commanded S code does not match any of the gear stages, the "Spindle no gear
selected (SNGE)" signal will be output separately from this signal.
[Related signals]
Spindle function strobe (SFn: X658 to)
Spindle no gear selected (SNGE: X986)
6. EXPLANATION OF INTERFACE SIGNALS
6.1 PLC Input Signals (Bit Type: X***)
Signal
abbreviation
GR1, GR2
Spindle gear
shift command
GR2 GR1
0 0
0 1
1 0
1 1
6-1-61
1st spindle
X98D, 98E
Range "S0 to S (Smax1)"
Range "S (Smax1)+1 to S (Smax2)"
Range "S (Smax2)+1 to S (Smax3)"
When range over "S (Smax3)+1" is specified.
2nd spindle 3rd spindle
X9BD, 9BE X9ED, 9EE