Precision Digital Corporation PROVU PD6402, Instruction Manual

Page: 37 / 47

P
RO
V
U
™ PD6402 High Voltage & mV to Current Meter
Instruction Manual
37
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 P
RO
V
U
Modbus Register Tables
located at www.predig.com for details.
Note: Changes made to the Serial menu are initialized
after the menu key is pressed or after
navigating through the remainder of the serial
parameters (i.e. pass the t-byte parameter).
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.
Select Menu (
SElect
)
The Select menu is used to select the number of
linearization points applied to the input for either
channel A or V, adder and factor constants applied to
the power function P=([I*V]+C)*F, low-value cutoff,
and analog output programming.
Multi-Point Linearization (
Linear
)
The multi-point linearization can be used to linearize
the display for non-linear signals. The
Function menu
is used to access the Linear menu and select the
number of linearization points applied to the input for
either Ch-A or Ch-V. Meters are set up at the factory
for linear function with 2-point linearization. Up to 32
linearization points can be selected for each channel
under the linear function.
Note: After Scale is displayed continue pressing the
Enter button until the meter completes the
scaling of the input and display values.