Mitsubishi Electric MELSEC FX2N-64CL-M, User Manual

Page: 39 / 74

FX2N-64CL-M CC-Link/LT Master Block Assignment of I/O Nos. 8
8-3
8.3 Automatic I/O No. assignment
The I/O Nos. can be assigned automatically in the CONFIG mode.
Parameter settings and sequence programs are not necessary for this assignment.
8.3.1 Automatic I/O No. assignment procedure
Execute the steps 1) to 3) below to automatically assign the I/O Nos.
1) Connect each remote I/O unit to the FX
2N
-64CL-M. In the FX
2N
-64CL-M, set bit 6 of the DIP
switch to ON, and set bit 7 (to select the CONFIG mode) to OFF. Power up, first, the power
adapter, then, the PLC.
The FX
2N
-64CL-M acquires the information (I/O type and number of points) on connected
remote stations, and stores it to the buffer memory [BFM #32 (20h) to #95 (5Fh)] and built-
in memory (EEPROM).
2) Confirm that the contents of the buffer memory [BFM #32 (20h) to #95 (5Fh)] are consistent
with the actual system configuration.
3) Set bit 6 of the DIP switch in the FX
2N
-64CL-M to OFF. Reset the power to the PLC.
The FX
2N
-64CL-M reads the information on connected remote stations from the built-in
memory (EEPROM), and assigns the I/O No.
8.4 Specification of reserved station
The FX
2N
-64CL-M assigns the I/O No. in the CONFIG mode. If remote stations will be added in
the future, temporary I/O Nos. can be assigned (specification of reserved stations).
By this function, even if remote stations are added, it is not necessary to change the I/O Nos.
assigned to other remote stations and extension blocks/units connected to the PLC.
If remote stations are connected in places for reserved station, the connected remote stations
can operate with the existing setting, but errors such as wire breakage cannot be detected.
After connecting remote additional stations, execute automatic I/O No. assignment in the
CONFIG mode again. The system will update the detailed remote station information, and the
new remote stations will be able to be used normally (errors will be detected).