User manual - COUNTER
7.3.8.
”PrESCA” menu
This menu contains parameter which configure the prescalling parameters (recalculations
of counted pulses). This menu allows the user to set individual prescalers, and to scale the
counter in desired units.
If
”PArUPd”
option is set to
”on rES”
mode, then change of parameters
”muL”
,
”div”
,
”oFFSEt”, ”Point”
and all parameters of the relays controlling (see
”rELAy”
menu), has no influence on current counting process. In this mode changed
parameters will be applied after reset (manual or automatic) or next device power
up. If
”PArUPd”
option is set to
”immEd”
mode, then all changes of these
parameters are applied immediately.
“muL”
- multiply coefficient , range -99999 do 999999, except 0,
“div”
- divide coefficient, range 1 do 999999, (this parameter defines the internal modulo
counter),
“oFFSEt”
- offset coefficient, range: -99999 do 999999 (constant value added to the result to
move the zero point of the current scale),
“Point”
- decimal point position.
Displayed result is calculated due to the expression:
W
=
L
m
×
"muL"
L
w
×
"muL"
"div"
"oFFSEt"
where:
W - displayed result
L
m
- the internal main counter value
L
w
- the internal (modulo) precounter value
Parameter
“div”
can't be set to “000000”, entered value is controlled by firmware.
The precounter (modulo) and main counter are internal registers of the counter's
firmware and they contain not calculated (by
mul
and
div
parameters) numbers of pulses
delivered to the counting inputs {A} and {B}. The modulo counter contains the fractional part of
the result (ratio of
„div”
parameter). Main counter contains the integer part of the result (not
recalculated). If parameter “
div
” is set to 1, then main counter contains the number of all
pulses delivered to counting inputs.
Firmware uses fixed point arithmetic (rounding down).
“AutoPr”
- autoprescaling procedure. Pressing
[ENTER]
starts display of message
„run ?”
.
To start procedure of setting parameters
“muL”, “div”
and
”Point”
press
[ENTER]
again. To cancel this procedure press
[ESC/MENU]
. Detailed description of this
procedure user can find in chapter
AUTOPRESCALER
on page 18.
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Summary of Contents for BDC94
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