Emerson 2330MKII manual Speed Control, Torque Control, Jog

BOOK 0958-B

TABLE 5. DYNAMIC BRAKING CHARACTERISTICSa

		RATED					RATED
COMPONENT	MODEL					HORSEPOWER
		VOLTAGE
			1/6	1/4	1/3	1/2	3/4	1	1-1/2	2	3
	2331	115V	180	129	103	66	44	34	NA	NA	NA
BRAKING TORQUE (%)	2335	230V	NA	NA	400	278	190	130	88	62	NA
	2332	115V	300	215	170	110	75	60	NA	NA	NA
	2336	230V	NA	NA	NA	400	320	220	145	105	85
	2331	115V	15	12	11	8	6	2	NA	NA	NA
STOPS PER MINUTE	2335	230V	NA	NA	12	8	6	1	1	1	NA
	2332	115V	9	6	5	5	4	4	NA	NA	NA
	2336	230V	NA	NA	NA	5	4	4	3	3	2

a.HIGH INERTIA LOADS MAY EXTEND BRAKING TIME AND CAUSE THE WATTAGE RATING OF THE DYNAMIC BRAKING RESISTORS TO BE EXCEEDED.

An antiplug feature is included with optional Armature Contactor Reversing With Dynamic Braking (Option 1004). This feature prevents restarting the motor before the motor has braked to a stop.

SPEED CONTROL

Motor speed is directly proportional to the setting of the MOTOR SPEED potentiometer or the magnitude of an external speed reference signal, as applicable. This potentiometer or the speed reference signal may be adjusted while the motor is running or may be preset before the motor is started.

The rates of acceleration and deceleration are preset by the ACCEL and DECEL potentiometers, respectively, located on the controller control board.

Maximum speed and minimum speed are preset by the MAX SPD and MIN SPD potentiometers, respectively, located on the control board.

TORQUE CONTROL

Motor torque is directly proportional to the setting of the CURRENT LIMIT potentiometer or the magnitude of an external torque reference signal, as selected by dip switch SW3, position 3. This potentiometer or the current reference signal may be adjusted while the motor is running or may be preset before the motor is started. Note that if the process demands less torque then the torque reference is commanding, motor speed will continue to increase up to maximum speed.

JOG

If a RUN-STOP-JOG switch is used, place the switch in JOG position. Otherwise initiate a Jog command. Jog is momentary, causing motor rotation only while the switch is held in JOG position or while a Jog command is active. Release the switch to stop the motor.

Normally, jog speed is directly proportional to the setting of the MOTOR SPEED potentiometer. If a separate JOG SPEED potentiometer is used, jog speed will be directly proportional to the setting of the JOG SPEED potentiometer.

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