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I/O module type-2 fo
Connector board
Connection manual
A-80950E
FANUC LTD
15. Address allocation
For the Connector panel I/O module , I/O addresses are mapped as follows.
I/O module type-2 is allocated a group of DI addresses(16 bytes) and a group of
DO addresses(8 bytes). Expansion module 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 address are fixed regardless of whether Expansion module 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 a MPG, allocate DI addresses in units of 16 bytes. Do not use the DI space from
Xm + 12 through Xm + 14 for Ladder; the CNC process the MPG counter value directly.
DI address Xm+15 is used for detecting over current and overheating alarms that occur
in the IC used in the DO driver. This address is fixed regardless of whether Expansion
module 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 unit of 16byte.
DI space map DO space map
Xm Yn
Xm + 1 Yn + 1
Xm + 2 Yn + 2
Xm + 3 Yn + 3
Basic module
Xm + 4 Yn + 4
Xm + 5
Basic module
Yn + 5
Xm + 6 Yn + 6
Xm + 7 Yn + 7
Expansion module
Xm + 8
Xm + 9
Xm + 10
Xm + 11
Expansion module
Xm + 12(for 1st MPG)
Xm + 13(for 2nd MPG)
Xm + 14(for 3rd MPG)
Xm + 15
(DO Alarm Detection)
Basic module