Delta AS Series Manual page 600

AS Ser ies M od ul e Man ua l
Overview
The AS02HC-A module is a high-speed counter module with two built-in channels. It performs counting through receiving
the pulse signal input or SSI encoder signal input. It is only connected to the right side of AS series CPU modules.
Configuring it to the right side of the remote modules is not allowed. This chapter mainly introduces the specifications,
functions and operation of the module.
Characteristics
1. Pulse signal / SSI signal input interface selection
Pulse input: Supports single-phase pulse input, two-phase pulse input (multiplication x2/4) and CW / CCW pulse input,
5V differential signal and 5-24VDC single-ended signal. The counting speed can reach up to 200kHz
(for single-phase input).
SSI input: The data transmission frequency can reach up to 1.25 MHz; the received data length can be up to 31 bits;
supports multi-turn and single-turn SSI encoders as well as the conversion of gray and binary codes.
2. 32-bit counter
The two channels of AS02HC-A are both 32-bit counters with the counting range of -2147483648 to 2147483647.
Counter type setting
3.
Ring counter: cyclical counting between -2147483648 and 2147483647.
14
Linear counter: The upper and lower limit values need be set. When the counter value is out of the allowed range,
4. High-speed comparison
Preset a comparison value and compare it with the present value of the counter. When they are equal, the external
output point actions can be controlled, the interrupt program can be executed or the counter value can be cleared at
the same time.
Phase-Ｚ function selection
5.
Each of the two channels is configured with a phase Z which can be used as the external input point for Reset,
Capture or Gate control.
6. External output points
Four external output points. They can be controlled individually or be used for the output together with high-speed
comparison function.
7. Counter value capture
The counting value is captured through a phase Z input trigger or channel comparison-matched trigger.
8. Pulse rate and rotation rate (RPM) measurement
The function measures the input pulse rate and position change rate of the SSI encoder. And the rotation speed
(RPM) can be calculated automatically.
9. Use the tool software for easy settings
HWCONFIG built in ISPSoft can be used to create the hardware module configuration so that users can directly
select the mode and parameters without spending time programming to set up the registers corresponding to a
variety of functions.
10. Miscellaneous API instructions
The functions such as counter control, counter value capture, high-speed comparison output and measurement can
be achieved via dedicated API instructions.
1 4 - 2
the module can detect that the upper or lower limit is exceeded.