4. Functions
46
SMC-4DL-PCI, SMC-8DL-PCI
LTC (counter latch input)
Signal to latch with the counter value, allowing the counter value to be cleared immediately after
latching or an interrupt request to be generated upon latching. The input logic can be changed by
software.
PCS (positioning control start input)
Signal for overriding (replacing) the target position, allowing positioning to be performed by the set
amount of shifting from the input-ON timing. The input logic can be changed by software.
General-purpose output signals
This product has general-purpose output signals (OUT1 - OUT3) in addition to pulse output signal.
OUT1 - OUT3 (General-purpose output signals)
OUT1 - OUT3 (general-purpose output signals) can be used to write data to I/O ports. Since these are
independent of motor control, they do not affect pulse output even during motor operation. As three
signals are provided for each axis, they can be used to output the level output signal for the servo-on and
hold-off to the motor driver unit, one-shot pulse signal for each clear signal and the comparator output
signal. The output logic can also be changed by software.
ALMCLR (alarm clear output signal), ERC (driver differential clear output)
ALMCLR and ERC are signals to output clear one-shot pulses to the alarm clear and deviation counter
clear inputs of the motor driver unit. The width of one-shot pulses (output logic changeable) can be
selected from among
12
µ
sec,
102
µ
sec,
408
µ
sec, 1.6 msec, 13 msec, 52 msec, 104 msec.
CP1, CP2 (comparator output)
CP1 and CP2 are signals for comparing the counter value to the set comparator value. The output logic
can also be changed by software.
P.COM (Plus common)
P.COM is the plus common signal for limit input signals (+LIM, -LIM, SD, ORG) and general-purpose
input/output signals (IN1 - IN7, OUT1 - OUT3).
GND (Ground)
GND is the ground line for the general-purpose output signals (OUT1 - OUT3).
