10.7 Strobe Function
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Jetter AG
10.7
Strobe Function
The strobe function is for storing the actual count value to register 3xx0 because of
an external hardware pulse, the so-called strobe signal. The count value is stored
once the edge of the strobe signal
rises
, and can be read out of register 3xx2 "Dual-
channel counter - strobe value".
The JX2-CNT1 hardware directly issues the strobe signal and stores the count value.
With digital filter disabled, the sampling time is
>
10 µs. This means that within 10 µs
after a rising edge arrives at terminal X21.STR the current count value is stored. If
the filter is enabled, the sampling time extends by one cycle of the fundamental
frequency set for the filter.
The strobe function is enabled if virtual output xx01 "Signal activation" of the JX2-
CNT1 module is reset (0 = STR enabled / REF disabled). If this is the case, the count
value is stored every time the edge of the strobe signal rises. Bit 0 "Dual-channel
counter - strobe status" in register 3xx3 "Status / Controller" shows whether a strobe
signal has been issued and the count value in register 3xx2 is valid. If bit 0 equals to
1, a strobe event has occurred, and the stored count value can be read out of register
3xx2.
Bit 0 remains set until it is reset by the user by entering a value into register 3xx3
"Status / Controller". If a strobe event is received before bit 0 is reset, bit 4 "Dual-
channel counter - strobe overflow status" in register 3xx3 is set additionally. Bit 4 is
not reset until a value is entered into register 3xx3.
Register 3xx2: Dual-Channel Counter - Strobe Value
Function
Description
Read
Actual count value or value that has been stored last
Write
Illegal
Value range
- 8.388.608 ... + 8,388,607 [increments]
Value following reset
0
Содержание JetWeb JX2-CNT1
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Страница 18: ...1 Safety Instructions JetWeb 18 Jetter AG ...
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Страница 58: ...8 2 Firmware Version JetWeb 58 Jetter AG ...
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Страница 63: ...JX2 CNT1 10 Dual Channel Counter Jetter AG 63 Fig 13 Signal waveform for single channel counting ...
Страница 74: ...11 1 Reading in SSI data JetWeb 74 Jetter AG Fig 18 Examples Reading in Different SSI Formats ...
Страница 82: ...12 1 Sample Program JetWeb 80 Jetter AG ...
Страница 90: ...13 2 Mode 2 Operation along with JM 2xx JetWeb 94 Jetter AG ...
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