5-7
Display Cause of errorError detection
function
Alarm codeDisplay Cause of errorError detection
function
ALO3ALO2ALO1
ON ON OFF Motor-load deviation
over (See note 3.)
The error for a fully-closed or semi-closed
encoder is greater than or equal to the
number of command units set in Pn51A.
OFF ON ON Option detection error
(See note 3.)
An Option Unit has been removed.
OFF ON OFF Missing phase de-
tected.
Main-circuit power supply missing phase or
disconnection detected.
OFF ON OFF Motor current error
(See note 4.)
The current that flows to the Servomotor is
abnormally small for the torque command
from the Servo Driver.
OFF ON OFF Motor conduction er-
ror (See note 4.)
When the Servomotor is ON, the baseblock
condition continues, regardless of the Ser-
vo Driver settings or external input.
--- --- --- Parameter Unit trans-
mission error 1
Data could not be transmitted after the
power supply was turned ON.
--- --- --- Parameter Unit trans-
mission error 2
Transmission timeout error
Note 1. Alarm codes designated “---” are undefined.
Note 2. When an alarm occurs, ALM
(alarm output) is turned OFF.
Note 3. These alarms are supported for Servo Drivers with a software version of “r.0014” or later.
Note 4. These alarms are supported for Servo Drivers with a software version of “r.0037” or later.
H Warning Table
Display
Alarm code
Warning detection
Meaning
ALO1 ALO2 ALO3
function
OFF OFF OFF Deviation counter over-
flow (See note 6.)
Deviation counter residual pulses ex-
ceeded the deviation counter overflow
level set in Pn505 multiplied by the ratio
(%) set in Pn51E.
ON OFF OFF Overload When a warning occurs before the over-
load alarm (A.71, A.72) is reached, the
alarm may be generated if the Servomo-
tor continues to operate.
OFF ON OFF Regeneration overload When a warning occurs before the re-
generation overload alarm (A.32) is
reached, the alarm may be generated if
the Servomotor continues to operate.
ON ON OFF Battery warning (ABS)
(See note 5.)
A battery alarm (A.83) will occur in the
near future, possibly the next time the
power supply is turned ON. (Replace
with battery with the control circuit pow-
er supply turned ON.)
Note 1. Alarm codes designated “---” are undefined.
Note 2. When Pn001.3 (warning code output selection) is set to 1, warning codes will be output (de-
fault setting is 1).
Note 3. To output warnings, allocate the output terminal using Pn50F.3 (WARN signal output terminal
allocation).
Troubleshooting Chapter 5
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