
B-63494EN/02 6.PARAMETERS
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4372 Safe speed of each spindle
4438 Safe speed 2 of each spindle
4440 Safe speed 3 of each spindle
4442 Safe speed 4 of each spindle
[Data type] Word
[Unit of data] min
-1
[Valid data range] 0 to 32767
Set a safety speed for each spindle in terms of motor speed.
With the dual check safety function, the CNC and spindle software
always check the speed of each spindle motor.
In safety signal mode B (state in which a guard open request is input,
and the guard is closed), if there is at least one spindle whose speed is
greater than the safety speed, guard unlock signal (*LGD) is set to 0 to
disable guard unlocking. The state in which the speeds of all spindle
motors are within the safety speeds is one condition for setting guard
unlock signal (*LGD) to 1 (to enable guard unlocking).
In safety signal mode C (state in which a guard open request is input
and the guard is open), if a spindle speed exceeds the safety speed, a
spindle alarm No.757 (No.767) or spindle alarm 69 is issued for the
corresponding spindle.
Up to four safety speeds can be set. Which safety speeds to choose
depends on the safety speed/safety position selection signal (safety
input signal). For details, see Section 5.2, "SIGNALS".
CAUTION
1 Safety speed parameter No. 4372, No. 4438, No.
4440, and No. 4442 are safety parameters, so that
these parameters are protected using the key and
code of Dual Check Safety. To modify a safety
speed parameter, set a code for safety parameters
as the key for safety parameters (parameter No.
3226).
2 When the value of a safety speed parameter (No.
4372, No. 4438, No. 4440, and No. 4442) has been
changed, the power must be turned off before
operation is continued.