Precision Digital Corporation PROVU PD6363, Инструкция по эксплуатации

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P
RO
V
U
™ PD6363 Dual Analog Input Rate/Totalizer
Instruction Manual
44
Contact De-Bounce Filter (
FiLter
)
The filter function (
Filter
) is the second option in the
Advanced Features menu. The filter function (
FiLter
)
can be used for applications where the meter is set up
to count pulses generated by switch contacts. The
filter value can be set anywhere between 2 and 50,
the higher the value, the greater the filtering. Channel
A and B have independent settings.
There are two settings,
Hi SPd
(high speed) and
Lo
SPd
(low speed). After pressing ENTER to select
Lo
SPd
, enter the desired filter setting based on the table
below so that there are no extra counts when a
contact closure is completed. Selecting
Hi SPd
does
not require a programmable filter value.
Filter Settings
Contact De-Bounce Filter
Filter Setting Speed Setting Max Freq (Hz)
2 Lo SPd 999
4 Lo SPd 499
8 Lo SPd 249
16 Lo SPd 124
32 Lo SPd 62
40 Lo SPd 50
50 Lo SPd 40
N/A Hi SPd 30,000
Rounding Feature (
round
)
The rounding feature is used to give the user a
steadier display with fluctuating signals. Rounding is
used in addition to the filter function.
Rounding causes the display to round to the nearest
value according to the rounding selected. This setting
affects the last two digits, regardless of decimal point
position.
Rounding
Selection Actual
Value Display
Value Actual
Value Display
Value
1 12.022 12.022 12.023 12.023
5 12.022 12.020 12.023 12.025
10 12.024 12.020 12.025 12.030
Modbus RTU Serial
Communications (
serial
)
The meter is equipped with serial communications
capability as a standard feature using Modbus RTU
Serial Communication Protocol.
The meter may be connected to a PC for initial
configuration via the onboard micro USB connection.
For ongoing digital communications with a computer
or other data terminal equipment, an RS-232, or
RS-485 option is required; see
Ordering Information
on page 6 for details.
•
DO NOT connect any equipment other than
Precision Digital’s expansion modules, cables, or
meters to the RJ45 M LINK connector. Otherwise
damage will occur to the equipment and the
meter.
Note: More detailed instructions are provided with
each optional serial communications adapter.
Note: Refer to the ProVu Modbus Register Tables
located at www.predig.com for details.
When using more than one meter in a multi-drop
mode, each meter must be provided with its own
unique address. The meter address (Slave ID) may
be programmed between 1 and 247. The transmit
delay may be set between 0 and 199 ms. The parity
can be set to even, odd, or none with 1 or 2 stop bits.
Changes made to the Serial menu are initialized after
the MENU key is pressed or after navigating through
the t-byte parameter.