
Specified address+0
Specified address+1
Specified address+2
Specified address+3
Spindle motor
rotation command
} Spindle gear
} selection
} Spindle override
ȣ
Ȧ
Ȥ
B–61863E/15
5. FUNCTIONAL INSTRUCTIONS
PMC SEQUENCE PROGRAM
335
(i) Lower spindle motor speed limit data
Sets the lower spindle motor speed limit obtained from the
following expression:
Lower spindle motor
speed limit data =
8191
Minimum speed (min
–1
) specified for
the spindle motor
Maximum speed (min
–1
) obtainable by the
spindle motor
A value from 0 to 8191 can be specified as the lower speed limit
data. The maximum spindle motor speed is achieved when 10 V
is applied to the motor.
(ii) Upper spindle motor speed limit data
Sets the upper spindle motor speed limit obtained from the
following expression:
Upper spindle motor
speed limit data =
8191
Maximum speed (min
–1
) specified for
the spindle motor
Maximum speed (min
–1
) obtainable by
the spindle motor
(iii) Maximum spindle speed for GR1
Sets a maximum spindle speed (min
–1
) for GR1. The maximum
spindle speed must be set in this parameter even when GR1 gear
is not provided. The maximum spindle speed is the speed of the
spindle when the motor operates at its maximum speed.
(iv) Maximum spindle speed for GR2
Sets a maximum spindle speed (min
–1
) for GR2. When GR2 is
not provided, this parameter must be set to 0.
(v) Maximum spindle speed for GR3
Sets a maximum spindle speed (min
–1
) for GR3. When GR3 is
not provided, this parameter must be set to 0.
(vi) Maximum spindle speed for GR4
Sets a maximum spindle speed (min
–1
) for GR4. When GR4 is
not provided, this parameter must be set to 0.
(c) Control data address
Contiguous 4–byte memory locations starting at the even–numbered
address specified in the control data address parameter must be
specified.
76543210
R08 R07 R06 R05 R04 R03 R02 R01
R13 R12 R11 R10 R09
GR4 GR3 GR2 GR1
SOV128 SOV64 SOV32 SOV16 SOV8 SOV4 SOV2 SOV1
(i) Spindle gear selection
76543210
GR4 GR3 GR2 GR1
[For automatic gear selection]
This functional instruction finds an appropriate gear using the
spindle speed data and the maximum spindle speed for each
gear, then outputs the result to GR1 to GR4.