Jetter JetWeb JX2-CNT1, User Manual

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JX2-CNT1 10 Dual-Channel Counter
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10 Dual-Channel Counter
The dual-channel counter is for reading in signals from incremental encoders. In
doing so, the signal is subject to quadruple evaluation, that is, all 4 edges of both
signals K1 and K2 are counted. The dual-channel can also be used as single-
channel counter with 24 V signal level. For more information on this refer to “Dual-
Channel Counter as Single-Channel Counter" on page 62. For technical information
on the dual-channel counter refer to "Technical Data" in chapter 5 "Technical Data",
page 27. For information on how to connect the different counter signals to the dual-
channel counter refer to chapter 6.7 "Dual-Channel Counter", page 37.
The dual-channel counter is enabled if virtual output xx04 "Encoder selection" is
reset. This is the default setting.
Furthermore, the count value of the dual-channel counter can be zeroed by means
of a reference switch and the K0 signal of an incremental encoder. The strobe
function is used to save the count value at the time when the strobe signal was issued
(capture function).
The built-in digital filter is for filtering out interfering frequencies out of the useful
signal. The digital filter is disabled by default.
10.1 Reversal of Counting Direction
If the dual-channel counter is used along with incremental encoders, the counting
direction depends on the wiring of the K1 and K2 signals. To reverse the counting
direction, signals K1 and K2 must be reversed.
10.2 Count Value
The count value of the dual-channel counter can be seen in register 3xx4 "Count
value".
The count value can be changed by manually entering a value into register 3xx0, for
example zero to reset the count to zero.
Output xx04 = 0
Register 3xx0: Count Value
Function Description
Read Maximum count of dual-channel counter
Write New count of dual-channel counter
Value range - 8.388.608 ... + 8,388,607 [increments]
Value following reset 0