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4. Pulse Train Input Interface <br />
4.4.2 Alarm Causes<br />
Abbreviation Display<br />
Alarm cause<br />
DE Indicates the disconnection of the encoder input signal A, B and C –phase.<br />
Observed at all times.<br />
OV Indicates that the input power voltage is above the specification range.<br />
At power-up, the input voltage specification automatically recognizes 24V or 48V. Alarm will be<br />
triggered according to the following excess voltage detection values dependent on input<br />
voltage specification.<br />
24V inputapprox. above 36V<br />
48 inputapprox. above 55V<br />
MPE Indicates that the input power voltage is below the specification range.<br />
The detection voltage is shown below.<br />
24V inputapprox. below 15V<br />
48inputapprox. below 30V<br />
Not detected during servo OFF.<br />
Termination of power with servo ON may trigger alarm output.<br />
ALM history will be saved only if the power voltage returns to normal<br />
after low-voltage detection.<br />
RSTE When the power of the PB system is turned on, Initialization action detects the<br />
initial phase of the sensor, initializes the internal counter, and switches to servo<br />
ON status. If the sensor initial phase cannot be detected because of overload<br />
and power line disconnection etc, it results in an Alarm condition.<br />
If there is an ALM, STOP or Interlock (Type R) status after the power is<br />
turned ON, Initialization will not be executed.<br />
Refer to Chapter 6 for more information about load tolerance.<br />
Refer to Section 4.6 for Initialization details.<br />
OVF When the position deviationDifferences between the actual position and<br />
the command position set by pulse inputexceeds the Command 14h<br />
setting value, an Alarm condition will result.<br />
Confirm that it is not used under unreasonable acceleration / deceleration or<br />
overload conditions.<br />
OL Indicates that before reaching the target position, the load was inoperative for<br />
a certain time.<br />
The detection time for inoperative status can be set using command 14h.<br />
Check the cause such as the load reached the mechanical limit.<br />
Not detected when Maximum current during operation 2 is selected.<br />
OS Indicates a velocity error. If the actual velocity exceeds approx. 5200min -1 , it<br />
results in an Alarm condition.<br />
Confirm that it is not used under unreasonable acceleration / deceleration or<br />
overload conditions.<br />
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