Diagnostics; Preliminary Checks - Mitsubishi Electric FX2N-32ASI-M User Manual

FX2N-32ASI-M AS-interface Master Block
8.

Diagnostics

8.1

Preliminary Checks

1) Check "POWER" and "U ASI" LED.
a) If "POWER" LED is OFF, check the connection of the 32ASI-M extension cable to the
programmable controller.
b) If "U ASI" LED is OFF, check the current rating of AS-interface power supply, wiring and, total
distance of system. For detail of total distance, refer to section 8.1 6).
2) Check the 24 V DC power supply for slave.
If whether this power supply capacity is not enough or miss-wiring is, the slave is not normal
operation.
3) Check "ASI ACTIVE" and "CONFIG ERR" LED.
a) If "ASI ACTIVE" LED is OFF, check the wiring about the slave.
b) If "CONFIG ERR" LED is ON, check the wiring about the slave. And see section 8.2.
4) Check total slave number.
If total slave number is more than 31, please remove an unnecessary slave and adjust the number of
total slaves to 31 or less.
5) Check whether it is an intended slave configuration.
If it is not so, please remake slave configuration.
6) Check total extension distance.
The total extension distance must not exceed 100m (328.1
is possible to extend by 100m repeater. Repeaters can be used up to two system.
'
). However, when the repeater is used, it
Diagnostics 8.
8-1