BEKA BA368C, Руководство пользователя

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2.1 DESCRIPTION
When programmed as a counter the BA368C will
accept pulses on one or both inputs and may be
programmed to display:
Input A + Input B
Input A
-
Input B
Input A direction controlled by Input B
Quadrature input (Input A and Input B
electrically 90
o
apart)
A separate six digit display may be activated to
show the input pulse rate in engineering units per
second, minute or per hour.
In addition to simple counting applications, the
quadrature input allows direction of movement and
position to be displayed.
The total display may be reset from the instrument
front panel, or by closure of a remote contact.
The instrument also maintains a grand total which
can only be reset from within the programme
menu.
An optional 4/20mA output current sink may be
programmed to produce a linear output
proportional to any positive part of the displayed
total or displayed rate. For applications where the
instrument is counting pulses on one or both
inputs, (Input A + Input B) an optional retransmitted
pulse output is also available.
Two optional alarm outputs may be programmed to
operate on positive total or rate displays allowing
simple batching applications to be performed.
2.1.1 Initialisation and loss of power
When power is applied to a BA368C counter,
following initialisation the instrument will start
functioning using the programmed parameters
stored in permanent memory. If during operation
the power supply is interrupted, all programme
parameters, the displayed total and the grand total
will be stored in permanent memory.
2.1.2 Controls
The BA368C counter is controlled and calibrated
via four front panel push-button switches. In the
display mode i.e. when the instrument is counting
the switch functions are:
Description of Switch Functions
E+Down While these buttons are pushed the
total display will show the eight digit
grand total and the grand total
annunciator will be activated.
Down+Up Resets the total display to zero or to
the reset value when these two push-
buttons are operated simultaneously
for more than two seconds.
Selectable function from programme
menu. See section 2.5.14
P+Down While these buttons are pushed the
instrument will display the firmware
and version numbers plus the
programmed function.
Note : When optional alarms are fitted, the
BA368C may be programmed to provide direct
access to the alarm setpoints from the display
mode by operating the
P + Up push-buttons.
See section 2.6.10
2.1.3 Displays
The BA368C counter has two digital displays and
associated annunciators.
Total Shows total count since last
display reset on larger display which
has a range of -9999999 to
99999999.
Rate Shows rate on smaller lower
display display which has a range of –
99999 to 999999.
May be turned off – see 2.5.7
Reset Activated while total display is
Annunciator being reset.
Grand total Activated while grand total is
Annunciator being displayed.
Alarm Activated when optional alarm
Annunciators is activated.