GE IC754VSI12VTD Touch screen

A faulty Close for Rated contact may remain in the accelerate position with the contact open. If the Close for Rated contact is operative, loss of idle control may be due to a faulty circuit. In general, adjustment of LOW IDLE SPEED will vary the speed of the prime mover with the Close for Rated contact in the decelerate (open) position. Adjustment of LOW IDLE SPEED should not affect prime mover speed when the Close of Rated contact is closed.

WARNINGThe speed-setting controls have sufficient range to override the ramp and bring the prime-mover speed up to rated while still in the low-idle mode (because of control or switching defect). A Close for Rated contact that is intermittent may cause the prime mover to overspeed if the RATED SPEED setting is adjusted for rated speed with terminal 5 open.

Speed setting controls. 

If adjustment of external speed trim causes instability, check potentiometer with ohmmeter for erratic behavior. (Turn power off). Use nonlubricating electrical cleaner if necessary. If internal potentiometer is faulty, replace control. Improper linkage adjustment. Make sure the actuator moves about 2/3 of its travel from no load to full load. Be sure linkage provides a proportional change in power for every change in actuator terminal-shaft position. Refer to the actuator manual for more detailed linkage instructions.

Necessary wires not properly shielded. 

Electrical noise, caused by wiring carrying an ac voltage or stray magnetic fields, can be picked up by improperly shielded wire. Noise will cause instability. See "Shielding" in Chapter 3.Adjust GAIN, RESET, and ACTUATOR COMPENSATION as described in "Adjust for Stable Operation" and "Dynamic Adjustment" in Chapter 3.

Superior products

We mainly make spare parts for DCS, PLC, robot control system and large servo system.

Main products: various modules/cards, controllers, touch screens, servo drives.

Advantages: professional off production accessories,

Fast delivery, accurate delivery time,

Main brands include ABB, GE/FANC, FOXBORO, TRICONEX, BENTLY NEVADA, A-B, EMERSON, OVATION, MOTOROLA, XYVOM, HONEYWELL, REXROTH, KUKA, NI, DEIF, Reliance Electric, Yokogawa, WOODWARD, SCHNEIDER, MOOG, PROSOFT and other brands