Chapter 14  High Speed Counter Module AS02HC 
14-3  
  Specifications and Functions 
  Specifications 
Functional specification 
Item 
Description 
Number of channels 
2 
Pulse Input 
Input type 
Phase A/B differential pulse input (multiplication x2/4), CW/CCW pulse 
inputs and pulse + direction inputs 
200 kHz 
Max. transmission 
200 kHz → 30 m 
Counter type 
Ring counter, linear counter 
SSI Input 
31-bit (The single-turn, multi-turn and status data length can be set.) 
Transmission 
frequency 
250 kHz, 500 kHz, 625 kHz, 1 MHz, 1.25 MHz 
Max. transmission 
distance 
250 kHz → 150 m 
500 kHz → 50 m 
625 kHz → 40 m 
1 MHz → 20 m 
1.25 MHz → 10 m 
None, odd parity, even parity 
Counter type 
Absolute counter and ring counter 
Counter 
Counting range 
-2147483648 ~ 2147483647 (32-bit counter) 
Counter control 
Reset, preset, gate, capture offset correction for absolute position 
State check 
Count direction, counting overflow/underflow, linear counting beyond the 
lower and upper limit values, SSI feedback, SSI position exceeding the 
protection limit, SSI parity checking, SSI communication status, a zero 
point is set beyond SSI encoder resolution 
External input 
point (phase Z) 
2 (one point per channel) 
Function   
Counter reset, gate control, counting value capture 
Disabled, 100 us, 200 us …20 ms 
interrupt response 
10 us (hardware response time included) 
External output 
point 
Output point 
4 
NPN transistor (sinking) 
Comparison 
function 
Instruction   
General comparison output instruction, table comparison output 
instruction 
Interrupt 
Using comparison to achieve the interrupt function 
Measurement 
function 
Measured item 
Pulse rate and rotation rate (RPM) 
Average times 
1 ~ 10 times