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PD6210 Analog Input Batch Controller Instruction Manual
45
Noise Filter (
filter
)
The noise filter is available for unusually noisy signals that cause an unstable process variable display.
The noise filter averages the input signal over a certain period. The filter level determines the length of
time over which the signal is averaged. The filter level can be set between 2 and 199. The higher the filter
level, the longer the averaging time and so the longer it takes the display to settle to its final value. Setting
the filter level to zero disables the filter function.
Noise Filter Bypass (
bypass
)
The noise filter bypass changes the behavior of the controller so that small variations in the signal are
filtered out but large abrupt changes in the input signal are displayed immediately. The bypass value
determines the minimum amount of signal change to be displayed immediately. All signal changes
smaller than the bypass value are filtered or averaged by the controller. The noise filter bypass may be
set between 0.1 and 99.9% of full scale.
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. This
setting affects the last two digits, regardless of decimal point position.
Modbus RTU Serial Communications (
serial
)
The controller 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.
Warning!
Do not connect any equipment other than Precision Digital’s
expansion modules, cables, or controllers to the RJ45 M-LINK
connector. Otherwise damage will occur to the equipment
and the controller.
Note: More detailed instructions are provided with each optional serial communications adapter. Note:
Modbus Register Tables located at www.predig.com for details.
When using more than one controller in a multi-drop mode, each controller must be provided with its own
unique address. The controller 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.
