PD8-6060 Explosion-Proof Dual Analog Input Process Meter
Instruction Manual
54
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. See
examples below:
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 on-board USB connection. For
ongoing digital communications with a computer or
other data terminal equipment, use the RS-485
connection.
•
DO NOT
connect any equipment to the RJ45
M-LINK connector. Otherwise damage will occur
to the equipment and the meter.
•
DO NOT
disconnect the RJ45 connector located
to the left of the power terminal block. Doing so
will disable the on-board digital I/O, and the
RS-485 serial communications.
Notes:
1.
Refer to the ProtEX-MAX Modbus
®
Register Tables
located at
2.
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.
Select Menu (
SElect
)
The
Select
menu is used to select the input signal
conditioning function applied to the inputs (linear,
square root, programmable exponent, or round
horizontal tank), math function for A & B, constants,
low-flow cutoff, and analog output programming.
Multi-point linearization is part of the linear function
selection.
Input Signal Conditioning (
Functn
)
The
Function
menu is used to select the input-to-output
transfer function applied to the input signal: linear,
square root, programmable exponent, 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.
