
B-63494EN/02 5.I/O SIGNALS
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5.5.3 1-CPU 2-Path Control
A single group of safety areas can be provided under 1-CPU 2-path
control. A single FSSB I/O unit is required.
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)
and a safety signal input to the FSSB I/O unit (DI
M
). 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 (DI
M
). Because
just a single group of safety areas is provided, these three safety input
signals (DI
1C
, DI
2C
, and DI
M
) should be equal.
The following three safety output signals should be provided to the
single group of safety areas: safety signal output from tool post 1
(DO
1C
: F191), safety signal output from tool post 2 (DO
2C
: F1191),
and safety signal output from the FSSB I/O unit (DO
M
).
CNC
CPU
Monitor
CPU
Safety area
Guard
MCC
and so on
Safety area
Guard
MCC
and so on
cross-
check
MAIN BOARD
Path 1
Path 2
DIM
DOM
DI2C
DO1C
DI1C
DO2C