
B-63494EN/02 5.I/O SIGNALS
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5.5 NOTES ON MULTI-PATH CONTROL
This section describes cautions about safe-related I/O signals that
should be taken in multi-path control.
5.5.1 2-CPU 2-Path Control (without Axis Change between Paths)
If there is no axis change between paths under 2-CPU 2-path control,
a single independent group of safety areas can be provided for each
path (two groups of safety areas in total). Two FSSB I/O units, that is
one unit for each path, are required. (The two FSSB I/O units are
required even if just one group of safety areas is provided.)
Two groups of safety input signals are cross-checked. The first group
consists of a safety signal input to tool post 1 (DI
1C
: X008#4, G191 in
the figure below) and a safety signal input to the FSSB I/O unit
connected to tool post 1 (DI
1M
). The second group consists of a safety
signal input to tool post 2 (DI
2C
: X008#4, G1191) and a safety signal
input to the FSSB I/O unit connected to tool post 2 (DI
2M
).
Safety output signals should be provided to the safety areas, as
follows: Provide a safety signal output from tool post 1 (DO
1C
: F191)
and a safety signal output from the FSSB I/O unit connected to tool
post 1 (DO
1M
) to the safety area of tool post 1; Provide a safety signal
output from tool post 2 (DO
2C
: F1191) and a safety signal output from
the FSSB I/O unit connected to tool post 2 (DO
2M
) to the safety area
of tool post 2.
CNC
CPU
Monitor
CPU
Safety area 1
Guard
MCC
and so on
Safety area 1
Guard
MCC
and so on
cross-
check
MAIN BOARD
CNC
CPU
Monitor
CPU
Safety area 2
Guard
MCC
and so on
Safety area 2
Guard
MCC
and so on
cross-
check
SUB BOARD
Path 2Path 1
DI1M
DO1M
DI1C
DO1C
DI2M
DO2M
DI2C
DO2C