Specifications

Troubleshooting Appendix
Motion controller Q170MCPU/ Q172DCPU/ Q173DCPU A - 3
A.2 Troubleshooting
The following flowcharts show the contents of the troubles with the motion controllers classified into
a variety of groups according to the types of events.
A.2.1 Q170MCPU
Fig. A-4: Troubleshooting flowchart for Q170MCPU
NOTE The procedure of fault finding for each event group (a) to (p), mentioned on the right side of the
above flowchart, is described in chapter 6 of the users manual of the motion controller
Q170MCPU.
Motion
CPU
area
PLC
CPU
area
Error-occurrence description
"POWER" LED turns off
"." does not flash in the first digit of
7-segment LED
"A00" displays on 7-segment LED
"AL" "L01" displays on 7-segment LED
"AL" "A1" "" displays on
7-segment LED
"BT" displays on 7-segment LED
"…" displays on 7-segment LED
Servo amplifier does not start
"AL" "S01" displays on 7-segment LED
"MODE" LED does not turn on
"MODE" LED is flickering
"RUN" LED turns off
"RUN" LED is flickering
"ERR." LED turns on/is flickering
"USER" LED turns on
"BAT. " LED (Yellow) turns on
(a) "Flowchart for when "POWER LED" turns off"
(b) "Flowchart for when "." does not flash in the first digit of
7-segment LED"
(c) "Flowchart for when "A00" displays on 7-segment LED"
(d) "Flowchart for when "AL" "L01" displays on
7-segment LED"
(e) "Flowchart for when "AL" "A1" "" displays on
7-segment LED"
(f) "Flowchart for when "BT" displays on 7-segment LED"
(g) "Flowchart for when "…" displays on 7-segment LED"
(h) "Flowchart for when the Servo amplifier does not start
(i) "Flowchart for when "AL" "S01" displays on
7-segment LED"
(j) "Flowchart for when "MODE" LED does not turn on"
(k) "Flowchart for when "MODE" LED is flickering"
(l) "Flowchart for when "RUN" LED turns off"
(m) "Flowchart for when "RUN" is flickering"
(n) "Flowchart for when "ERR." LED turns on/is flickering"
(o) "Flowchart for when "USER" LED turns on"
(p) "Flowchart for when "BAT. " LED (Yellow) turns on"