— 11-1 —
11. Alarm and Warning
11.1. Identifying Alarm and Warning
If an error occurs in the Megatorque Motor System, the EDC Driver Unit gives an alarm or a
warning.
Table 11-1: Category of abnormality and condition of the System
Error
state
Seriousness Output signal Motor condition Recovery
Alarm
Reports an occurrence
serious problem and input
of emergency stop
DRDY output opens*. Motor servo off
• Power off.
• In case of an emergency stop, clear
the input EMST.
Warning
Reports an occurrence of
minor problem that can
be easily rectified.
WRN output opens*.
Depends on a
warning.
• You can clear a warning with the
input ACLR, the command CL and a
reset of power (Off→On). However,
it is necessary to remedy the cause.
Over
travel
limit
Reports one of the over
travel limits is activated.
Either one of OTPA or
OTPM*, from which the
Motor entered, opens*.
Stops immediately.
Input of limit
direction is not
accepted.
• Move the Motor out of the off limits
area.
* When the setting of logic is the shipping set
11.1.1. LED Alarm Indicator
Turn on the power and confirm the 7 segments LED (alarm indicator) on the front panel of the
Driver Unit for the condition of the System. If it is in the state shown in the Figure 11-1 below,
an alarm or warning is occurring.
◊ If the parameter LED (LED mode) is set other than LM0, the alarm indicator does not
report the occurrence of alarm or warning. (In such a case, it shows the state of the
settings of the control inputs and outputs.)
Fig 11-1: When error occurs Fig 11-2: In normal state
Power LED: It tuns on when the power is on.
Normal state: Green
Error occurs: Orange
7segments LED: Identifies a type of alarm.
It indicates a type of alarm in 2 digit
numbers. The numbers will be dispalyed
in time sharing.
If two or more errors occurs, the LED
indicates them in the same manner as
described above.
Power LED: Turns on when the power
turns on.
• Normal state: Green • Error: Oran
e
Fig 11-3: Example of simaltaneous occurance of the alarm F3 and F4.
(Hardware over travel limit and Emergency stop)
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