
B–63503EN/02
9. CONNECTION TO FANUC I/O Link
149
If a system alarm occurs in the CNC using the operator’s panel I/O
module, or if I/O Link communication between the CNC and operator’s
panel I/O module fails, all the DO signals of the I/O module are turned
off. Therefore, sufficient care is necessary when setting up the machine
sequence. Also, the same phenomenon occurs if the power to the CNC
or the I/O module is turned off.
For the operator’s panel I/O module, I/O addresses are mapped as follows.
Xm
Xm+1
Xm+2
Xm+3
Xm+4
Xm+5
Xm+6
Xm+7
Xm+8
Xm+9
Xm+10
Xm+11
Reserved
Xm+12
Xm+13
Xm+14
Xm+15 (DO alarm
detection)
Yn
Yn+1
Yn+2
Yn+3
Yn+4
Yn+5
Yn+6
Yn+7
DI space map
General–purpose
input signal
Reserved
Matrix input
signal
Reserved
DO alarm
detection
DO space map
Output signal
Reserved
NOTE
Reserved addresses can not used.
The operator’s panel I/O module is allocated a group of DI addresses (16
bytes) and a group of DO addresses (8 bytes). This address allocation is
explained below.
DI address Xm+15 is used for detecting overcurrent and overheating
alarms that may occur in the IC used in the DO driver. [For details, see
the section describing the detection of DO (output signal) alarms.] This
address is fixed, and must be allocated as a work area before it can be used.
Therefore, when using this area, allocate DI addresses in units of 16 bytes.
Basically, I/O addresses can be allocated to the operator’s panel I/O
module freely.
9.5.9
Other Notes
DO signal reaction to a
system alarm
Address allocation