Laser beta lasermike LS8000-3 - Manual (Page 129)

LaserSpeed 8000-3 Instruction Handbook
RS-232/RS-422 Communication
Part No. 93463 / Drawing No. 0921-01561 Page 129 of 221 Revision A (Sep 2007)
&
Quality Factor Warning Threshold
&<CR>
Read
Response Format:
<N>
&<N><CR>
Set
<N>
is an integer from 0 to 15 specifying the threshold at which the Quality Factor Warning
Output will turn on. If the QF goes below this value for longer than the Quality Factor
Warning Timeout, the output will turn on. To turn back off again, the QF must go above the
threshold for longer than the timeout.
Voltage High: QF is less than the Warning Threshold
Voltage Low: QF is greater than or equal to the Warning Threshold
This output is available on either pulse output, or on the Index Pulse output, as an alternate
configuration. See the %, $H, and $L commands for details.
<
Quality Factor Warning Timeout
<<CR>
Read
Response Format:
<N>
<<N><CR>
Set
<N>
is an integer from 0 to 65,535 specifying the number of milliseconds that the QF must be
below the Quality Factor Warning Threshold before the warning output will trigger.
The default value is 10,000, which is 10 seconds. This means that the QF must be below
the threshold for 10 seconds before the output will trigger. This setting should be kept fairly
large to avoid nuisance alarms.
A
Direction Inversion Switch
A<CR>
Read
Response Format:
<N>
A<N><CR>
Set
<N>
is an integer, either 0 or 1. Changes the function of the Direction Digital input. Changing the
direction will also change the phase of the pulse outputs, causing a connected quadrature counter to
count in the opposite direction.
Value Line Direction
0
Normal –A low voltage on the Direction Input (or leaving it disconnected) will cause the
gauge to measure a positive velocity and the length to count up, and a high (5-24V)
voltage on the Direction Input will cause the gauge to measure a negative velocity and
the length to count down.
1
Reversed – The polarity of the digital input is reversed, so a low will cause the gauge to
measure a negative velocity, and a high (5-24V) will cause the gauge to measure a
positive velocity.