AXIOMTEK AX92352, Руководство пользователя

Страница: 23 / 29

AX92352/AX92353 2-CH Encoder Card with Real-time Trigger I/O
Operating 17
4.1.3 Encoder Homing
This function can clear the counter value when Phase Z has a rising edge or when the
user gives the command. Further, the user can configure a specific value by software.
When a current value equals a value of setting, the counter value will reset zero.
4.1.4 Encoder Linear Trigger
This function allows the user to compare counter values using the encoder linear
function. Each encoder supports two linear functions and has four parameters of
configuration as below: Start Point, Repeat Times, Interval and Direction.

Trigger Point (N+1) = Trigger Point N + Interval
(N = Repeat Times; the first trigger condition is the start point.)
Trigger output will generate an output signal when Trigger Point equals the current
counter value of a selected encoder channel.
4.1.5 Encoder FIFO Trigger
The encoder FIFO trigger function utilizes FIFO (first-in first-out) storage to process
preset position data. Furthermore, each encoder supports one encoder FIFO trigger
function. After the preset position is compared, trigger output will generate an output
signal. Meanwhile, the user also can input new data into FIFO.
4.1.6 Encoder Counter Value Latch
The encoder counter value latch function is used for handling latch input signals. The
user can set rising or falling trigger. When the signal is triggered, the encoder counter
value will be saved to latch register. Further, the user can read this value and apply it to
different cases.
The diagram shows the case of position latch.