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PCI-1220U User Manual 22
3.7 General Purposed Input for Servo Drives
nINPOS is an input signal from servo drives for in-position check, it is
active after the servo drives finish a position command. Users can enable/
disable this pin. When enable this function, the n-DRV bit in RR0 will
change to 0 after servo drives finish the in-position check and nINPOS
pin active.
nALARM is an input signal from servo drives for drives alarm output.
When servo drives have an abnormal condition, they active this signal to
note PCI-1220U to stop output pulses. When enable the nALARM func-
tion of PCI-1220U, the D14 bit of RR2 will set to 1 after nALARM
active. If PCI-1220U is driving pulses output, the output pulses will stop
immediately when nALARM active.
Figure 3.10: Input Signal for Servo Motor
This signal must be supplied from the external source DC12 ~ 24V, and
the response time of this circuit should take about 0.25 msec because of
the delay of photo coupled and RC filter.
Furthermore, this two signals can be used as general purposed input while
user could read the input register 1 and 2 (RR4, RR5) to get the status of
this two signal.