CHAPTER 2 WIRING
2-78
Description of I/O Signals
2
Type Nature of alarm ALM4 ALM3 ALM2 ALM1 ALM0 Code
Battery warning 1 0 1 1 1 17H
Maintenance
function
Life warning 1 1 0 0 0 18H
BCD error 1 1 0 0 1 19H
Address
error
Out-of-range error 1 1 0 1 0 1AH
Command rejection 1 1 0 1 1 1BH
BCD error 1 1 1 0 0 1CH
Out-of-range error, 0 data write 1 1 1 0 1 1DH
Data error
Negative sign designation 1 1 1 1 0 1EH
If two or more alarms occur simultaneously, alarms are output in the priority specified in the table
above.
The life warning is for the capacitors in the main circuit inside the servo amplifier and the cooling
fan (OR condition).
+OT detection: Sequence output signal (Reference value 38)
-OT detection: Sequence output signal (Reference value 39)
The state of over-travel (±OT) is output.
Function
The corresponding positive or negative OT detection sequence output is turned on while the +OT
or -OT sequence input signal terminal remains turned off.
Parameter setting
To assign positive or negative OT detection to a sequence output terminal, specify the
corresponding value ("38" or "39") to the output terminal function setting parameter.
Relevant description
(1) OT detection
The signal is turned on when the servomotor detects the OT signal in either the positive or
negative direction. For details, refer to page 2-67.
(2) Software OT
Set PA2_25 (software OT selection) at "1" to allow movement in the position range between
(PA2_26 (positive software OT detection position)) and (PA2_27 (negative software OT detection
position)).
For details, refer to "PA2_25 to 27 (software OT selection/position command format, software OT
detection position)."
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