Rockwell Automation Publication 520-UM001G-EN-E - September 2014 123
Programming and Parameters Chapter 3
Advanced Program Group (continued)
A540 [Var PWM Disable] Related Parameter(s): A440
Stop drive before changing this parameter.
Enables/disables a feature that varies the carrier frequency for the PWM output waveform defined by A440 [PWM Frequency].
Options 0 “Enabled” (Default)
1“Disabled”
A541 [Auto Rstrt Tries] Related Parameter(s): A542
Sets the maximum number of times the drive attempts to reset a fault and restart. See Chapter 4 for more information on faults and fault codes.
Clear a Type 1 fault and restart the drive.
1. Set A541 [Auto Rstrt Tries] to a value other than “0”.
2. Set A542 [Auto Rstrt Delay] to a value other than “0”.
Clear an OverVoltage, UnderVoltage or Heatsink OvrTmp fault without restarting the drive.
1. Set A541 [Auto Rstrt Tries] to a value other than “0”.
2. Set A542
[Auto Rstrt Delay] to “0”.
Values Default: 0
Min/Max: 0/9
Display: 1
ATTENTION: Equipment damage and/or personal injury may result if this parameter is used in an inappropriate application. Do not use this function without
considering applicable local, national and international codes, standards, regulations or industry guidelines.
A542 [Auto Rstrt Delay] Related Parameter(s): A541
Sets the time between restart attempts if A541 [Auto Rstrt Tries] is not zero.
Values Default: 1.0 s
Min/Max: 0.0/120.0 s
Display: 0.1 s
A543 [Start At PowerUp]
Stop drive before changing this parameter.
Enables/disables drive start on power up without a Start command being cycled. Requires a digital input configured for Run or Start and a valid start contact.
Options 0 “Disabled” (Default)
1“Enabled”
ATTENTION: Equipment damage and/or personal injury may result if this parameter is used in an inappropriate application. Do not use this function without
considering applicable local, national and international codes, standards, regulations or industry guidelines.
A544 [Reverse Disable] Related Parameter(s): b006
Stop drive before changing this parameter.
Enables/disables the function that allows the direction of motor rotation to be changed.
Options 0 “Rev Enabled” (Default)
1 “Rev Disabled”
A545 [Flying Start En]
Sets the condition that allows the drive to reconnect to a spinning motor at actual RPM.
Options 0 “Disabled” (Default)
1 “Enabled” Catch and ramp to commanded speed at every drive start.
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