P
RO
V
U
™ PD6001 Analog Input Feet & Inches Meter
Instruction Manual
40
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 on board USB connection. For
ongoing digital communications with a computer or
other data terminal equipment, an RS-232, or
RS-485 option is required; see
•
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.
Notes
1. More detailed instructions are provided with each
optional serial communications adapter.
2. Refer to the P
RO
V
U
Modbus Register Tables
located at
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.
Select Menu (
SElect
)
The
Select
menu is used to select the input signal
conditioner applied to the input (linear or round
horizontal tank), low-height cutoff, and analog output
programming. The multi-point linearization is part of
the linear function selection.
Input Signal Conditioning (
Functn
)
The
Function
menu is used to select the input signal
conditioner applied to the input: linear or round
horizontal tank volume calculation. Multi-point
linearization is part of the linear function selection.
Meters are set up at the factory for linear function with
2-point linearization. The linear function provides a
display that is linear with respect to the input signal.
Multi-Point Linearization (
Linear
)
Meters are set up at the factory for linear function with
2-point linearization. Up to 32 linearization points can
be selected for PV1 under the linear function. The
multi-point linearization can be used to linearize the
display for non-linear signals such as those from level
transmitters used to measure volume in odd-shaped
tanks.
If the dual-scale level feature has been selected, the
menus for PV1 & PV2 are enabled. PV2 can be
programmed with up to 8 linearization points.
