Rockwell-automation 150 USE MN/SMC DIALOG + CONTROLLER Manual do Utilizador descarregar pdf (Página 146)

Diagnostics

9-3

Fault Definitions

Power Loss

Power loss indicates that an input power phase is not present. The

controller’s LCD display will identify the missing phase.

Note: If all three phases are absent when a start command is issued,

the LCD will display “Starting” without motor rotation.

Line Fault

①

Line fault with the affected phase displayed identifies three possible

pre-start conditions.

• Phase loss

• Load loss

• Shorted SCR

Line fault with no phase indication is displayed when one of the

following conditions occurs while the SMC Dialog Plus controller is

in the run mode.

• Phase loss

• Load loss

• Shorted SCR

Phase Reversal

Phase reversal is indicated when the incoming power to the SMC

Dialog Plus controller is in any sequence other than ABC. This pre-

start protective feature can be disabled.

Overvoltage and Undervoltage Protection

①

Overvoltage and undervoltage protection are user-defined as a

percentage of the programmed line voltage. The SMC Dialog Plus

controller continuously monitors the three supply phases. The

calculated average is then compared to the programmed trip level.

①

Phase loss, overvoltage, and undervoltage protection are disabled during braking operation.

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 188 189

Sem comentários

Rockwell-automation 150 USE MN/SMC DIALOG + CONTROLLER Manual do Utilizador Página 146