Mitsubishi Electric MELDAS C6 Interface Manual page 284

B con-
Signal name
tact
ORIENTED SPINDLE SPEED
—
COMMAND
[Function]
This signal is used to run the spindle motor at low speed when executing mechanical orientation
during spindle control.
<Supplement>
Since most spindle drive/control units recently marketed are equipped with spindle orient
command function, and therefore this signal is rarely used for mechanical orientation. The signal
(SORC) can be used for other application such as constant rotation.
[Operation]
When the signal (SORC) turns ON, spindle speed is changed to the low speed previously set by
parameter.
It should be noted that "Spindle stop" signal (SSTP) must be ON to use the signal (SORC).
The relation of spindle orientation rotation speed and "Spindle gear select input" signal is as follows.
Gear select
Gear
signal
stage
GI2
1 0
2 0
3 1
4 1
Spindle speed data while "Oriented spindle speed command" signal is ON can be determined from
the formula shown below.
When "Spindle gear select" signal combination is GI2=0 and GI1=1 and maximum spindle speed is
10, for example.
Oriented spindle speed command
speed data
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
SORC
Spindle speed
limit
GI1
0 Slimt1
1 Slimt2
0 Slimt3
1 Slimt4
SORI
=
Slimt2
6-3-87
1st spindle 2nd spindle
YD36 YD66
Oriented spindle
stop speed
SORI
× 10
3rd spindle
YD96