
B–63083EN/02
9. CONNECTION TO FANUC I/O Link
153
If a system alarm occurs in a CNC using the connector panel I/O module,
or if I/O Link communication between the CNC and connector panel I/O
module fails, all the DO signals of the I/O module are turned off.
Therefore, due care must be taken 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 connector panel I/O module, I/O addresses are mapped as follows.
Xm+15
(DO alarm detection)
Xm+1
Xm+2
Xm
Xm+3
Xm+4
Xm+5
Xm+6
Xm+7
Xm+8
Xm+9
Xm+10
Xm+11
Xm+12 (for 1st MPG)
Xm+13 (for 2nd MPG)
Xm+14 (for 3rd MPG)
Yn
Yn+1
Yn+2
Yn+3
Yn+4
Yn+5
Yn+6
Yn+7
DI space map
Basic
module
Extension
module 1
Extension
module 2
Extension
module 3
Extension
module 1
Basic
module
Extension
module 1
Extension
module 2
Extension
module 3
DO space map
Basic
module
The basic connector panel I/O module is allocated a group of DI addresses
(16 bytes) and a group of DO addresses (8 bytes). Up to three hardware
extension modules can be added or removed as required. The reason for
this address allocation is explained below.
The MPG interface (MPG counter) occupies a DI space from Xm+12
through Xm+14. These addresses are fixed regardless of whether
extension module 2 or 3 is used, and Xm+12 through Xm+14 must be
allocated as a DI work area to enable the use of the MPG. Therefore, when
using an MPG for the i series CNC, allocate DI addresses in units of 16
bytes. Do not use the DI space from Xm+12 through Xm+14 for Ladder;
the CNC processes the MPG counter value directly.
DI address Xm+15 is used for detecting overcurrent and overheating
alarms that 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 regardless of whether extension module 2 or 3 is used, and
it must be allocated as a work area before it can be used. When using this
area, therefore, allocate DI addresses in units of 16 bytes.
Basically, I/O addresses can be allocated to the connector panel I/O
modules freely. When allocating DI addresses, however, consider also the
addresses that are directly supervised by the CNC, and keep the following
in mind.
9.4.20
Other Notes
DO signal reaction to a
system alarm
Address allocation