Precision Digital Corporation ProtEX-MAX PD8-6300, Инструкция по эксплуатации

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PD8-6300 Pulse Input Rate/Totalizer, Counter & Tachometer
Instruction Manual
56
Function Keys Operation
During operation, the programmable function keys
operate according to the way they have been
programmed in the
Advanced Features
– User
menu.
See Programmable Function Keys User Menu (
user
)
on page 54 for details.
See the table under Button Operation on page 55 ,
which shows the factory default settings for F1, F2,
and F3.
Digital Inputs Operation
Five (5) digital inputs, F4, DI-1 to DI-4, come standard
on the meter. These digital inputs are programmed
identically to function keys F1, F2, and F3. The inputs
are triggered with a contact closure to +5 V in the
case of digital inputs 1-4 or with an active high signal,
see
Digital I/O Connections on page 29 for details.
The F4 is triggered with a contact closure to COM or
with an active low signal. During operation, digital
inputs operate according to the way they are
programmed in the Advanced Features
– User menu.
See Programmable Function Keys User Menu (
user
)
on page 54 for details.
Total Reset Capabilities
The user may reset the total via a SafeTouch button,
the F4 terminal at the back of the meter, an external
contact closure on the digital inputs, automatically via
user selectable preset value and time delay, or
through serial communications.
Total Reset via SafeTouch Button
The three through-glass SafeTouch button function
keys can be programmed to reset the total and grand
total. This makes it possible for the user to reset either
the total or the grand total without opening the enclosure
cover and without the need for external devices. Of
course, if the total or grand total is password protected,
they will not reset when the function key is pressed.
Total Reset via F4 Terminal
The PD8-6300 includes a digital input (referred to as
the F4 terminal) located on the back of the electronics
module as standard that can be used to reset the total
or grand total, among other things. This is the preferred
method for externally resetting the total or grand total
because it does not interfere with the operation of the
SafeTouch buttons for programming as described
below in the Total Reset via Digital Input section.
Total Reset via Digital Input
In addition to the F4 digital input described above, the
PD8-6300 also includes four digital inputs that can be
used to reset the total or grand total. However, if a
digital input is used to reset the total, or for some
other purpose, the corresponding through-glass
SafeTouch button will function as a programming key.
Total Reset via Preset Value
The total and grand total can be programmed for
automatic reset based on a preset value determined
by the user. In the automatic reset mode, a
programmable time delay is available to reset the total
or grand total after the assigned preset is reached.
Total Reset via Serial
Communications
The total and grand total can be reset via serial
communications such as a Modbus command or
MeterView Pro.