Mitsubishi FX2N-64CL-M, User Manual

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FX2N-64CL-M CC-Link/LT Master Block Assignment of I/O numbers 8
8-5
8.4 Specification of reserved station
The FX
2N
-64CL-M assigns the I/O number in the CONFIG mode. If remote stations will be
added in the future, temporary I/O numbers 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
numbers 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 number 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).
8.4.1 Reserved station setting method
Set reserved stations using the steps 1) to 4) below.
1) Set the FX
2N
-64CL-M to the CONFIG Mode (by setting bit 6 of the DIP switch to ON and
setting bit 7 to OFF). Power up the FX
2N
-64CL-M.
(The FX
2N
-64CL-M will assign the I/O numbers.)
2) Write the information (station type and number of I/O points) for the station to be added in
the detailed remote station information buffers [BFM #32 (20h) to #95 (5Fh)]. Set the
reserved station flag (bit 15) to ON in the appropriate BFM.
(If the bit for reserved station is set to OFF, errors such as wire breakage are detected when
a remote station is not connected.)
3) Give the information on remote station and set to ON the reserved station flag bit in the
detailed remote station information for all remote stations to be added in the future, and
then give the instruction to write to the EEPROM [by rebooting the bit 4 of BFM #27 (1Bh)].
4) After setting the reserved station, confirm by checking bit 4 of BFM #28 (1Ch) that write to
the EEPROM is completed. After that, reboot the FX
2N
-64CL-M in the ONLINE mode (by
setting the DIP switch 6 to OFF), and then confirm that the detailed remote station
information [BFM #32 (20Ch) to #95 (5Fh)] indicates the changed contents.
Buffer memory No. Description
BFM #32(20h) Remote station information area for the station No.1
BFM #33(21h) Remote station information area for the station No.2
.
.
.
.
.
.
BFM #95(5Fh) Remote station information area for the station No.64