Instruction Manual

Chapter 7 Troubleshooting 7.1 Action to Be Taken upon Occurrence of Problem
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Chapter 7 Troubleshooting
7.1 Action to Be Taken upon Occurrence of Problem
Upon occurrence of a problem, take an appropriate action according to the procedure below in
order to ensure quick recovery and prevent recurrence of the problem.
1) Status LEDs and PIO Check on ERC3 and PIO Converter
[ERC3 main body]
{ : Illuminating × : OFF ڏ : Flashing
LED Status of PIO Output Signal
CON Mode Type MEC Mode Type
(GN) (RD)
Operation status
*ALM Output
(Note 1)
Control Power Supply ON ON
Control Power Supply OFF OFF
× ×
Servo OFF OFF
Motor driving power supply
OFF
OFF
Emergency Stop OFF
×
{
Alarm
(Operation cancellation level
or more)
OFF
{
× Servo ON ON
ڏ
×
During automatic servo-off
(Note 2)
ON
{ (OR)
In initializing process at
power being ON
OFF
Note 1 The output signals with * mark are the active low signals that turn ON in normal condition and turn
OFF while in abnormal condition.
Note 2 Servo-motor Auto OFF [Refer to Chapter 5 Power-saving Function]

[PIO converter]
{ : Illuminating × : OFF ڏ : Flashing
LED Status of PIO Output Signal
CON Mode Type
MEC Mode
Type
SV
(GN)
ALM
(RD)
Operation status
SV Output
(Servo ON)
*ALM Output
(Note 1)
(Alarm)
*EMGS Output
(Note 1)(Note 2)
(Emergency
Stop Status)
*ALM Output
(Note 1)
Control Power Supply ON OFF ON ON ON
Control Power Supply OFF OFF OFF OFF OFF
× ×
Servo OFF OFF OFF – OFF
Motor driving power supply
OFF
OFF OFF – OFF
Emergency Stop OFF OFF OFF OFF
×
{
Alarm
(Operation cancellation level
or more)
OFF OFF – OFF
{
× Servo ON ON ON ON ON
ڏ
×
During automatic servo-off
(Note 3)
OFF ON – ON
{ (OR)
In initializing process at
power being ON
OFF OFF – OFF
Note 1 The output signals with * mark are the active low signals that turn ON in normal condition and turn
OFF while in abnormal condition.
Note 2 *EMGS output is not prepared for Pulse Train Control Type.
Note 3 Servo-motor Auto OFF [Refer to Chapter 5 Power-saving Function]