High Speed Counting Input; Counting Mode - Xinje XG Series User Manual

5-3. High speed counting input

XG series PLC has a high-speed counting function independent of the scanning cycle of the programmable
controller. By selecting different counters, the measurement of high-speed input signals such as measurement
sensors and rotary encoders can be achieved. The maximum measurement frequency of XG1 can reach 80kHz,
and the maximum measurement frequency of XG2 can reach 200kHz.
Note:
(1) The high-speed counting input of XG1 series PLC can only receive the open collector signal (OC), not the
differential signal. Please be sure to choose the encoder of the open collector signal (OC).
Counter input
A
B
COM X1
COM X0
(2)
The high-speed counting input of XG2 series PLC can only receive differential signal (DIFF) and cannot
receive open collector signal. Please be sure to select the encoder of differential signal (DIFF).
Counter input
A- A+ B- B+
X0+ X1+
X0- X1- X3+
(3) When the counting frequency is higher than 25Hz, please choose a high-speed counter.
5-3-1．Counting mode
XG series high-speed counting function has two counting modes: incremental mode and AB phase mode.
X3 X5
X2 X4 X6
X2 X3-
X4+ X5
Rotary encoder
sensor
sensor
Rotary
encoder
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