Rockwell Automation 1771-PD PID MODULE (+DU) User Manual
Page 149
Chapter 5
5Ć14
5.
Connect the digital voltmeter across the 250 ohm resistor as close to
the resistor body as possible.
+lead to the TERMINAL 12(10) side of the resistor
-lead to the TERMINAL 11 side of the resistor
6.
Adjust R10 (R6) for a reading of +5.000V dc across the resistor.
7.
Short the lK resistor.
8.
Adjust R9 (R4) for a reading of +5.000V dc across the resistor.
9.
Place E5 (E4) in the IN position, inserted on both pins.
10. Adjust R8 (R3) for a reading of 1.000V dc across the resistor.
11. Place E5 (E4) in the OUT position.
12. Read the voltage across the 250 ohm resistor. It should be 5.000V dc
+2.5mV.
13. Remove the short across the 1K resistor.
14. Repeat steps 6 through 12 until steps 10 and 12 are satisfied without
further adjustment.
15. Repeat the procedure for loop 2.
16. Turn on +5V dc. Return E4 and E5 to their initial positions, IN or
OUT as recorded in section titled Installation.
Current Inputs
Using the following procedure with the input circuits configured to
current mode, adjust the input scaling resistor to produce a full-scale
reading from the A/D converter for a 20mA input. Repeat the procedure
for the loop 2 input after loop 2 has been completed.
1.
Place E14 (E15) in the IN position.
2.
Jumper TERMINAL 12 TO 18 (12 TO 16).