Measurement Computing CB-7080 - Manual (Page 11)

CB-7080 & CB-7080D Counter/Timer User's Guide Application notes
1-7
Counter alarm mode selection
There are no alarm functions in frequency mode (51). There are two counter alarm modes, Alarm Mode 0 and
Alarm Mode 1 . These two alarm modes can be used in both CB-7080 and CB-7080D.
Alarm Mode 0 is used for two-channel applications, as follows:
 To select alarm mode 0: ~AAA0 (for both channels)
 To enable channel 0: @AAEA0
 To disable channel 0: @AADA0
Set the high alarm limit of channel 0: @AAPA(data)
 if (counter 0 >= alarm limit 0)  D/O 0 turn ON
 if (counter 0 < alarm limit 0)  D/O 0 turn OFF
 Enable channel 1: @AAEA1
 Disable channel 1: @AADA1
Set the high alarm limit of channel 1: @AASA(data)
 if (counter 1 >= alarm limit 1)  D/O 1 turn ON
 if (counter 1 < alarm limit 1)  D/O 1 turn OFF
Alarm mode 1 is used for single-channel applications, as follows:
 Select alarm mode 1: ~AAA1 (for channel 0 only)
 Enable channel 0: @AAEAT
 Disable channel 0: @AADA
 Clear latch alarm: @AACA
 Set high alarm limit: @AAPA(data)
 Set high-high alarm limit: @AASA(data)
Counter 0 < high alarm OFF OFF
high alarm <= counter 0, and
counter 0 < high-high alarm
ON OFF
High-high alarm <= counter 0 ON ON
Note:
The high-high alarm must greater than the high-alarm.
Digital output application notes
The D/O0 and D/O1 can be used as D/O or an alarm output, as follows:
 D/O in the frequency mode.
 D/O in the counter mode and alarm disabled (by @AADA or @AADAN command).
 An alarm output in the counter mode and an alarm enable (by @AAEAT or @AAEAN command).