Rockwell-automation 1734-IT2I Thermocouple and RTD Input Module User M Instrukcja Użytkownika Pobierz pdf (Strona 42)

Publication 1734-UM004F-EN-E - December 2012

32 Configure Your Module

Advanced Setup Parameters

Advanced parameters you can set for the RTD module consist of:

• Notch filter – Select the Notch Filter for the analog to digital converter.

At higher frequencies, faster sample rates are possible

– 50 Hz

– 60 Hz (default)

– 100 Hz

– 120 Hz

– 200 Hz

– 240 Hz

– 300 Hz

– 400 Hz

– 480 Hz

If the filter value is changed, the module may require calibration to meet

specifications.

• Digital filter – A digital filter is available on this module. You set a time

constant that is used in the equation:

Yn = Yn-1 + (dt / (dt + T

) * (Xn-Yn-1)

Where: Yn = new data

Yn-1 = old data

dt = Channel Update Rate in milliseconds

= digital filter time constant

Xn = present unfiltered data

can be an integer from 0 to 10,000 ms. If set to 0, the filter is

disabled.

• Enable alarms latch – If enabled, alarms for this channel latch

FAULTED until a Latch Reset command is received.

The alarms effected are:

– Input Status

– Low and High level

– Range

• Disable alarms – If Alarms are Disabled, all alarms for this channel

show No FAULT. This is useful for unused channels.

• Level alarms – low-low, low, high, and high-high.

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Rockwell-automation 1734-IT2I Thermocouple and RTD Input Module User M Instrukcja Użytkownika Strona 42