IAI America SCON-CA - Manual (Page 249)

Chapter 9
Troubleshooting
239
[In the case of Positioner Mode]
Situation Possible cause Check/Treatment
Both position No. and
start signal are input to
the controller, but the
actuator does not move.
There is a problem either in PIO
signal treatment, position table
setting or operation mode selection.
1) Servo OFF condition
2) The pause signal is OFF.
3) Positioning command is issued
to a stop position.
4) There is no positioning data set
to the commanded position
number.
1) Is the status display LED SV turned
ON? [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.
3) Check the sequence or the settings
of the position table.
4) It will generate Alarm Code 0A2
“Position Data Error”. Conduct the
position table setting.
(Note) Refer to 2.1.3 [5] PIO Circuit for PIO signal.
[In the case of Pulse String 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 the status display LED SV turned
ON? [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.
3) Check the pulse train type.
[Refer to 3.3.4 [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. Reserve the logic setting
and try the operation.)
[Refer to 3.3.4 [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 3.3.4 [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 2.2.3 [5] PIO Circuit for PIO signal.