Industrial Motor Controls 18.a. The PLC motor speed control system you are working on has an analog current loop between the D/A module and the frequency inverter. What is the best method of checking this loop current? A. Open one of the signal wires in the loop and install a high-impedance VOM in series with the loop. B. Measure the voltage between the SIGNAL IN and +10V terminals of the inverter. C. Measure the voltage across the terminals of the D/A module. D. Open the loop and place a low-impedance VOM in series with the loop. 18.b. The register that is assigned to a D/A module in a motor speed control circuit must be assigned to that D/A module. How is this done? A. By placing the register for the D/A module in a configuration table B. By forcing a value into the register C. The registers are previously assigned by the PLC manufacturer. D. By setting DIP switches
Industrial Motor Controls
18.a. The PLC motor speed control system you are working on has an analog current loop between the D/A
module and the frequency inverter. What is the best method of checking this loop current?
A. Open one of the signal wires in the loop and install a high-impedance VOM in series with the loop.
B. Measure the voltage between the SIGNAL IN and +10V terminals of the inverter.
C. Measure the voltage across the terminals of the D/A module.
D. Open the loop and place a low-impedance VOM in series with the loop.
18.b. The register that is assigned to a D/A module in a motor speed control circuit must be assigned to that
D/A module. How is this done?
A. By placing the register for the D/A module in a configuration table
B. By forcing a value into the register
C. The registers are previously assigned by the PLC manufacturer.
D. By setting DIP switches
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