Helios Large Display Dual Analog Input Rate/Totalizer Instruction Manual
PD2-6262
52
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 the rounding selected. See
examples below:
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 5 for details.
Note: More detailed instructions are provided with each optional serial communications adapter.
Note: Refer to the 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.
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
Warning!
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.
Do not disconnect the RJ45 connector located to the left of the power terminal
block. Doing so will disable the onboard digital I/O, RS-485 serial
communications, and M-Link functionality.
