FANUC Power Mate i-MODEL H CONNECTION MANUAL (HARDWARE)

6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
B63173EN/03
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DO (output signal) alarm detection
The DO driver of the I/O module is capable of detecting an overcurrent
and measuring its own temperature. If an accident, such as the connecting
of the cable to ground, causes an abnormal increase in the load current or
in the driver temperature, a protection circuit, which is provided for each
DO driver (1 byte), is activated and keeps the DO signal for the relevant
1 byte in the OFF state until the cause of the problem is eliminated. Even
if this occurs, the Power Mate and I/O module continue operating. The
DI address (Xm+15) identifies the DO driver which has detected the
alarm. The following table shows the correspondence between the DI
address (Xm+15) bits and the DO addresses. Bit value 1 indicates that
the corresponding DO driver has detected an alarm. The contents of the
Xm+15 area can be checked by using the DGN screen of the Power Mate
or by performing alarm processing for the area in advance by using
Ladder. This helps alarm detection and recovery.
Alarm detection
address and bit
DO address Location
Xm+15.0 Yn+0 Basic unit
Xm+15.1 Yn+1 Basic unit
Xm+15.2 Yn+2 Extension unit 1
Xm+15.3 Yn+3 Extension unit 1
Xm+15.4 Yn+4 Extension unit 2
Xm+15.5 Yn+5 Extension unit 2
Xm+15.6 Yn+6 Extension unit 3
Xm+15.7 Yn+7 Extension unit 3
CAUTION
If the ladder program does not perform alarm processing for
Xm+15, the Power Mate cannot detect an error (if occurs)
in the DO driver.

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