
3.SAFETY FUNCTIONS B-63494EN/02
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Assignment of signals to controlled axes
Safety position switch signals can be assigned to arbitrary controlled
axes (even the maximum allowable number of points can be assigned
to one axis). The safety parameters (No. 13880 to No. 13911) are used
for assignment to axes.
Safety position switch signals can be assigned to a rotation axis.
Monitoring of an error
If a mismatch between the state of the safety position switch signal
posted via the PMC and the state of the safety position switch signal
posted via the FSSB lasts for the period of time (set in parameter No.
1945) or more, the CNC CPU and the monitor CPU assume the
occurrence of an error, and alarm No. 485 and No. 493 are issued. The
CNC CPU and the monitor CPU immediately shut off power to the
motor drive circuit independently of each other.
FSSB I/O module
To use the 9th to 32nd safety position switch signals with tool posts
other than tool post 2 for 1-CPU 2-path control and tool post 3 for
2-CPU 3-path control, attach an extension module to the FSSB I/O
module connected to each tool post.
To use safety position switch signals with tool post 2 for 1-CPU
2-path control (or with tool post 3 for 2-CPU 3-path control), attach an
extension module to the FSSB I/O module connected to tool post 1 (or
tool post 2).
If these conditions are not satisfied, alarm No. 493 is issued when the
power is turned on.
When using the first FSSB I/O module, set bit 4 of parameter No.
1905 to 1 and parameter No. 1936 to 0 with an axis for which
parameter No. 1023 is set to 1 (or parameter No. 1023 is set to 9 when
tool post 2 is used in 2-CPU 2-path control or tool post 2 is used in
2-CPU 3-path control). When using the second FSSB I/O module, set
bit 5 of parameter No .1905 to 1 and parameter No. 1937 to 0 with an
axis for which parameter No. 1023 is set to 1 (or parameter No. 1023
is set to 9 when tool post 2 is used in 2-CPU 2-path control or tool
post 2 is used in 2-CPU 3-path control).
IMPORTANT
The FSSB I/O module and separate detector
interface unit (pulse module) are handled as units
of the same type on the FSSB. The term "first unit"
or "second unit" used in the description represents
the first or second unit when counted without
making a distinction between the FSSB I/O module
and separate detector interface unit. If one FSSB
I/O module and one separate detector interface
unit are connected and if the separate detector
interface unit is closer to the CNC than the FSSB
I/O module on the FSSB, for instance, the FSSB
I/O module is referred to as the "second unit."