
B-63494EN/02 3.SAFETY FUNCTIONS
- 43 -
3.10 SAFETY POSITION SWITCH SIGNAL
Output of safety position switch signals
When the machine position on a controlled axis is within the
allowable range set in safety parameters, a safety position switch
signal is output.
• The signal is output after establishment of a reference position on
the target axis. The signal is not output before completion of
reference position return operation.
• As the machine position, not a specified position but an actual
position (position determined from feedback data sent from the
position detector) is used.
• Whether a safety position switch signal is output is determined
using the detection unit.
• When machine position = parameter-set value, the signal is
output.
• The signal is not output for an axis for which bit 6 of parameter
No. 1904 is set to 1 to disable Dual Check Safety.
Number of signal points
The table below indicates the maximum number of safety position
switch signal points for each tool post.
Tool
post 1
Tool
post 2
Tool
post 3
Applicable system
1-path control 32 (8) - -
Series 16
i/18i/21i-TB/MB,
Series 18
i-MB5
2-CPU 2-path
control
32 (8) 32 (8) -
Series 16i/18
i-TB,
Series 16
i-MB
1-CPU 2-path
control
16 (8) 16 (0) -
Series 16
i/18i-TB
2-CPU 3-path
control
32 (8) 16 (8) 16 (0)
Series 16
i-TB
NOTE
The parenthesized values are applicable when the
FSSB I/O module (extension) is not used.
Parameter-set value
0
1
Parameter-set value