1 The I/O Link–II connection terminal board (TBA) can be
mounted and dismounted with the I/O Link–II cable
After the TBA has been reconnected, tighten the terminal
board screws again.
2 When replacing this printed–circuit board from the basic
unit, detach the connector terminal board TBA in advance.
3 The above board is provided for A20B–0259–J210.
board for I/O
Do not change the setting of SH1.
Name Board state
1 LED1 J Turned on when the board starts normally.
2 LED2 J
Turned on when communication starts.
The board is used for a slave station. So, this LED is
turned on when a response is made to an initialization
3 LED3 J Turned on each time transmission is performed.
4 LED4 J
Turned on (to indicate that the station is a slave sta-
1 LEDA J
error was detected
in data reception.
1) Check the I/O Link–II cable.
2) Check the connector termi-
nal block TBA.
3) Check the state of the I/O
Link–II master unit.
4) Replace the board.
2 LEDB J
A parity error oc-
curred in the
memory on the
The error may be recovered by
turning the power off than back
on. However, replace the board.
[FANUC I/O Link–II slave board B]