Rockwell Automation 1769-IR6 Compact I/O 1769-IR6 RTD/Resistance Input Module User Manual

Page 62

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62

Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Chapter 4 Module Data, Status, and Channel Configuration

Channel Step Response

Another module characteristic determined by filter frequency is channel step
response, as shown in the following table. The step response is the time
required for the analog input signal to reach 100 percent of its expected final
value, given a full-scale step change in the input signal. Thus, if an input signal
changes faster than the channel step response, a portion of that signal will be
attenuated by the channel filter. The channel step response is calculated by a
settling time of 3 x (1 / filter frequency).

Table 10 - Filter Frequency versus Channel Step Response

Filter Frequency

Step Response

10 Hz

300 ms

50 Hz

60 ms

60 Hz

50 ms

250 Hz

12 ms

500 Hz

6 ms

1 kHz

3 ms

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