IAI MSEL, Instruction Manual, Page: 159 / 234

Chapter 6
Troubleshooting
151
Chapter 6 Troubleshooting
6.1 Action to Be Taken upon Occurrence of Problem
When a trouble is occurred, take an action following the steps described below in order to
have a rapid recovery and to avoid the recurrence of the same trouble.
1) Check on 7-Segment LED Display and LED Displays on Controller
y
Check the 7-segment display windows on the controller.
[Refer to the “3.3.2 Panel Window Display” for the displayed contents.]
y
Check the LED on the controller (a to e) in the figure below).
Displayed Contents of LED Lamps on Controller
No. Name Status when LED is ON
a RDY CPU Ready (Program operation available)
b ALM
CPU Alarm (Operation cancelled level or
higher error) occurs
c EMG Emergency stop, error in CPU hardware or
power-related hardware error
d HPS Home-return complete on all axes
e CKE
Error in system lock or power-related
hardware error
2) Check for alarm on the host controller (such as PLC)
3) Check the voltage of the main power supply.
4) Check the voltage of the PIO power supply (24V DC).
5) Check for the details of the alarm.
(Note 1)
For the alarm codes, check on a teaching tool such as the PC software.
6) Check on connectors for being disconnected or incomplete connection
7) Check on the connection, wire breakage and pinch of cables
When checking the electrical conductivity, cut off the main power of the devices mounted
to this controller (to prevent electric shock) and remove the cables on the measured part
(to avoid conductivity due to sneak circuit) prior to the check.
8) Check the I/O signals.
Check with using a teaching tool such as the host controller or PC software that there is
no inconsistency in the conditions of the input and output signals.
9) Check on noise preventing actions (e.g. connection of ground line, connection of noise
killer, etc.)
10) Review the events leading to the occurrence of a problem, as well as the operating
condition at the time of occurrence. (Note 1)
11) Cause analysis
12) Treatment
Notice: To handle a trouble, the cause is to be narrowed down by getting rid of the things
that can certainly be considered as normal. Please check all the items mentioned
in 1) to 10) before making a contact with us.
Note 1: Time when an alarm has issued can be checked.
Establish the clock setting using a teaching tool such as the PC software at the first time
the power is supplied to the controller.
[Refer to an instruction manual of a teaching tool such as the PC software for how to
establish the clock setting.]
Once the clock setting is established, the data can be retained for approximately ten days
with the power to the controller being off. Without the setting conducted or when clock data
is lost, the system starts with the time at 00h00m January 1, 2000 at the power being
turned on. Even if the time data is lost, a generated error code can be retained.
The alarms applicable for this function are those stated in Section 6.3 Alarm. Any error
which may occur in a teaching tool such as the PC software is not included.
a
b c
d e