Automationdirect.com Stellar SR44, User Manual

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5.4.11 – ‘Parameters’ Menu (continued)
Auto Config
Range: 0 to 255 (flags) Default: 6 Scaling: 1 Type: R/W
‘Auto Configuration’ – Set this parameter by individual bits.
• Bit #:
0: Auto Ramp – gently ramps voltage to starter; acts somewhat like an automatic current limit.
1: Auto 3MC – enable automatic removal of low voltage ramp for high start pedestals.
‘Auto 3MC’ applies only to ‘Start Pedestal’ voltages set above 50% (P-11 or P-79). The SR44
normally does a very brief low-voltage ramp up to the pedestal voltage level before the start ramp
begins, but ‘Auto 3MC’ applies a higher starting torque and eliminates this initial pedestal ramp for
pedestal voltages above 50%.
2: Auto Bypass – enable automatic bypass contactor detection.
‘Auto Bypass’ turns ‘On’ and ‘Off’ the automatic detection of a bypass contactor. When ‘On’, a
bypass contactor will be automatically detected. Soft-starter thyristor trips and thyristor short-circuit
trips will be disabled during Run (after full voltage is reached). Thyristor protection and thyristor
short-circuit protection are still available during the start ramp, and phase-loss protection is
available during both Start and Run.
3: Auto Jog – enable automatic Jog detection; Stop requests within about 0.5 seconds of a Start
request are forced to 0 stop time. Use this feature for short jogging of light loads
(For details & timing chart, refer to subsection “5.4.3 – ‘Auto Features’ Menu.”)
4: Auto Endstop – enable Detect Stalled Motor during soft-stop, and turn off thyristors.
5: Auto Stop – detect variations in PF during stop smooth stall.
6: Auto Endstart – enable detection of full speed during Start, and complete Start ramp.
7: Auto Pedestal – enable approximate detection of motor rotation at Start, and adjust pedestal to suit.
(P-86 ‘Auto Configuration 2’ is the 2nd parameter set counterpart of P-18 ‘Auto Configuration’.)
Opt Rate
Range: 4 to 30 Default: 5 Scaling: 1 Type: R/W
‘Optimize Rate’ sets the speed at which the SR44 will reduce the voltage during optimizing.
Some unstable loads benefit from a slower optimizing rate
P-18
An external user-supplied current transformer is required if any of the current or power related
trip or monitoring features are needed in bypass mode.
(Parameters: 8/B2, 9/B1/B2, 20, 21, 22, 23, 26, 28, 30, 32, 33, 34, 36, 39,
51/B1/B2/B3/B4, 87, 89, 91, 93, 112/B0/B1/B2/B3/B6, 121/B4)
Refer to Electrical Installation Chapter 2, subsections 2.4.1 & 2.5.2 for wiring information.
Auto Bypass detects the presence of a bypass contactor, and should be ON when using one.
Using a bypass contactor with Auto Bypass in the OFF state can cause thyristor faults.
P-19
Chapter 5: Keypad Menu Items and Parameters
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019