Rockwell-automation 1771-IR Series D RTD Input Module User Manual Manuale Utente Scaricare il pdf (Pagina 42)

6–4 Calibrating Your Module

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Gain Calibration

Calibrating gain requires that you apply 402.00 ohms across each

input channel.

Normally all inputs are calibrated together. To calibrate the gain of

an input, proceed as follows:

1. Connect 402.00 ohm resistors across each input channel as shown

in Figure 6.2 below.

Figure 6.2

Resistor Location for Gain Calibration

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2. Apply power to the module.

3. After the connections stabilize, request the gain calibration by

setting bit 01 in BTW word 15 and sending a block transfer write

(BTW) to the module.

NOTE: Normally, all channels are calibrated simultaneously (bits

10–15 of word 15 are octal 0). To disable calibration on any channel,

set (1) the corresponding bit 10 through 15 of word 15.

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 78 79

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Rockwell-automation 1771-IR Series D RTD Input Module User Manual Manuale Utente Pagina 42

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