IAI America ERC3 - Manual (Page 366)

Chapter 7
Troubleshooting
7.2 Fault Diagnosis
356
[In the case of Pulse Train Control Mode]
Situation Possible cause Check/Treatment
In spite of inputting
pulse-train to the
controller, the actuator
does not move.
PIO signal processing or parameter
setting is incorrect.
1) Servo OFF state
2) The pause signal is OFF.
3) The pulse-train type, a parameter, is
selected incorrectly.
4) The positive/negative logic of
pulse-train, a parameter, is selected
inversely.
5) The unit moving distance per pulse,
which is a setting condition of
electronic gear ratio, a parameter, is
too small.
1) Is Status LED on ERC3 turned ON
in green?
If PIO Converter is used, is Status
LED turned ON in green?
[Refer to Name for Each Parts and
Their Functions]
Turn ON the servo-on signal SON of
PIO.
2) Operation is available when PIO
pause signal *STP is ON and pause
when it is OFF. Turn it ON. [Refer to
Chapter 3, 3.2.2.]
3) Check the pulse train type.
[Refer to Chapter 4, 4.3 [8] (2)
Format Settings of Command Pulse
Train.]
4) Check the positive/negative logic of
pulse-train. (Host units supplied by
some manufacturers have
positive/negative logic opposite to
our logic. Reverse the logic setting
and try the operation.)
[Refer to Chapter 4, 4.3 [8] (2)
Format Settings of Command Pulse
Train.]
5) Do not make the unit moving
distance less than the resolution of
the encoder. The actuator does not
move unless pulses by the
resolution of the encoder are input.
[Refer to Caution in Chapter 4, 4.3
[8] (1) Electrical Gear Setting]
(Note) In case of 3) or 4), the actuator
may not sometimes operate
smoothly.
You may not find case 5) when
the actuator is moved for a long
distance at a high frequency.
(Note) Refer to Chapter 3 Wiring for PIO signal.