ADLINK PCI-8102 - Manual (Page 83)

72 Operations
driver is in ready state. It lets users to check something like the
motor driver’s power has been input or not. Or users can connect
this pin as a general input for other purpose. It doesn’t affect
motion control.
4.3.8 Servo Alarm Reset Switch
The servo driver will raise an alarm signal if there is something
wrong inside the servo driver. Some alarm situations like servo
motor over current, over speed, over loading and so on. Power
reset can clear the alarm status but users usually don’t want to
power off the servo motor when operating. There is one pin from
servo driver for users to reset the alarm status.Our motion control-
ler provides one general output pin for each axis. Users can use
this pin for resetting servo alarm status.
4.4 Mechanical Switch Interface
We provide some dedicated input pins for mechanical switches
like original switch (ORG), plus and minus end-limit switch (
±
EL),
slow down switch (SD), positioning start switch (PCS), counter
latch switch (LTC), emergency stop input (EMG) and counter clear
switch (CLR). These switches’ response time is very short, only a
few ASIC clock times. There is no real-time problem when using
these signals. All functions are done by motion ASIC. The soft-
ware can just do nothing and only need to wait the results.
4.4.1 Original or Home Signal
Our controller provides one original or home signal for each axis.
This signal is used for defining zero position of this axis. The logic
of this signal must be set properly before doing home procedure.
Please refer to home mode section for details.
4.4.2 End-Limit Switch Signal
The end-limit switches are usually installed on both ending sides
of one axis. We must install plus EL at the positive position of the
axis and minus EL at the negative position of the axis. These two
signals are for safety reason. If they are installed reversely, the
protection will be invalid. Once the motor’s moving part touches