
6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
B–63443EN/02
HARDWARE
66
NOTE
1 The emergency stop signal needs to be assigned to
address X0.4. To meet this requirement, make
assignments in the PMC in such a way that the input signals
of this module begin at address X0. X0.0 to X0.7 are DI pins
that can be selected for common signals. However, connect
the DICOM0 pin CE56 (A14) to 0 V.
2 X5.0 to X5.7 are DI pins for which a common voltage can be
selected. That is, by connecting the DICOM5 CE57(B14)
pin to the +24 V power supply, a DI signal can be input with
its logical state reversed. If, however, a cable is connected
to ground, it has the same effect as inputting an ON state
DI signal. To prevent this from occurring, the connection of
the DICOM5 CE57(B14) pin to the 0 V power supply is
recommended wherever possible.
3 For unused DI pins allocated to the addresses X5.0 to X5.7
for which the common voltage is fixed, the logic is fixed to
“0”. For unused pins allocated to the addresses for which
the common voltage can be selected, the logic is fixed to “0”
when the DICOM5 pin is connected to the 0 V power supply.
When the DICOM5 pin is connected to the +24 V power
supply, the logic is fixed to “1”. The logic of the unused pins
is variable when the contact of the DICOM5 pin is open.
WARNING
1 The emergency stop signal is not sent normally unless
DICOM0 pin CE56 (A14) is connected to 0 V. This is
because a failure to connect to the common line makes the
state of the input signal undefined.
2 Make sure that the CE56 connector will not come off.
Unless the CE56 connector is attached normally, the
common line gets disconnected, resulting in the emergency
stop signal input being undefined. Create a ladder program
in which a common–fixed signal that will not be turned on
unless the CE56 connector is attached normally is
combined with X0.4 to release the emergency stop signal
*ESP (G8.7) sent from the PMC to the CNC.