
EDIT.
SHEET
DRAW. NO.
CUST.
TITLE
24
29
DESCRIPTIONDESIG.DATE
I/O module type-2 fo
Connector board
Connection manual
A-80950E
FANUC LTD
16. DO(Output signal) alarm detection
The DO driver of the Basic module and Expansion module is capable of detecting an
over current 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 CNC 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. Manage the alarm well by using Ladder
program with bit signals in following table, when DO status becomes abnormal.
Alarm detection
Address and bit
DO address Location
Xm+15.0 Yn+0
Xm+15.1 Yn+1
Xm+15.2 Yn+2
Xm+15.3 Yn+3
Basic module
Xm+15.4 Yn+4
Xm+15.5 Yn+5
Xm+15.6 Yn+6
Xm+15.7 Yn+7
Expansion module