{"id":519,"date":"2015-08-27T15:12:51","date_gmt":"2015-08-27T15:12:51","guid":{"rendered":"http:\/\/www.mroelectric.com\/blog\/?p=519"},"modified":"2020-03-05T11:32:36","modified_gmt":"2020-03-05T16:32:36","slug":"control-techniques-unidrive-alarm-and-status-indications","status":"publish","type":"post","link":"https:\/\/www.mroelectric.com\/blog\/control-techniques-unidrive-alarm-and-status-indications\/","title":{"rendered":"Control Techniques UNIDRIVE Alarm and Status Indications"},"content":{"rendered":"
\"Control
Control Techniques Unidrives<\/figcaption><\/figure>\n

When there is a critical condition detected in your Control Techniques<\/a> UNIDRIVE<\/a>, the drive will continue to operate, but the lower display\u2019s status indication will be replaced by an alarm indication. When an HF trip takes place, the Drive Healthy relay will open and serial communications will not function. It is important to give attention to alarm indications, because if an issue is not corrected, the drive could trip.<\/p>\n

Refer to the guide below to help identify what kind of error your UNIDRIVE<\/a> may be experiencing. A comparison chart with status indications is also provided to help identify what happens at each stage of operation.
\n<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Alarm Code<\/th>\nAlarm Description<\/th>\n<\/tr>\n
AIR<\/td>\nControl PCB ambient temperature near maximum limit<\/td>\n<\/tr>\n
The ambient temperature around the control PCB has reached 90 degrees Celsius (194 degrees Fahrenheit). If the temperature continues to rise, the drive will trip OA.<\/td>\n<\/tr>\n
br.rS<\/td>\nBraking resistor is overloaded<\/td>\n<\/tr>\n
The braking resistor [l x t] accumulator in the drive has reached 75% of the value at which the drive will be tripped.<\/td>\n<\/tr>\n
Hot<\/td>\nHeatsink temperature near maximum limit<\/td>\n<\/tr>\n
The heatsink in the drive has reached 90 degree Celsius (194 degree Fahrenheit). If the temperature continues to rise, the drive will trip Oh2.<\/td>\n<\/tr>\n
OVLd<\/td>\nMotor is overloaded<\/td>\n<\/tr>\n
The motor [l x t] accumulator in the drive has reached 75% of the value at which the drive will be tripped.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Status Indications of the Drive<\/p>\n

These indications are seen in the lower display when the drive is in normal operation.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
LOWER DISPLAY<\/th>\nDESCRIPTION<\/th>\nSTAGE OF DRIVE OUTPUT<\/th>\n<\/tr>\n
Act<\/b><\/td>\nRegeneration Mode is active<\/b><\/td>\nENABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nRegen drive enabled and synchronized to the supply<\/td>\n<\/tr>\n
ACUU<\/b><\/td>\nAC Supply Loss<\/b><\/td>\nENABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive has detected that the AC supply has been lost and is decelerating the motor to maintain the DC bus voltage.<\/td>\n<\/tr>\n
dc<\/b><\/td>\nDC has been applied to the motor<\/b><\/td>\nENABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive is applying DC injection braking<\/td>\n<\/tr>\n
dEC<\/b><\/td>\nDeceleration<\/b><\/td>\nENABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive is decelerating the motor<\/td>\n<\/tr>\n
inh<\/b><\/td>\nInhibit<\/b><\/td>\nDISABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive has been inhibited and cannot be run. Could be because the Drive Enable signal is not applied to terminal 30 or Pr 6.15 is set to 0.<\/td>\n<\/tr>\n
POS<\/b><\/td>\nPositioning<\/b><\/td>\nENABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive is positioning the motor shaft<\/td>\n<\/tr>\n
rdY<\/b><\/td>\nReady<\/b><\/td>\nDISABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive is ready to be run<\/td>\n<\/tr>\n
run<\/b><\/td>\nRunning<\/b><\/td>\nENABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive is running<\/td>\n<\/tr>\n
SCAn<\/b><\/td>\nScanning<\/b><\/td>\nENABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nOL> Drive is searching for the motor frequency when synchronizing to a spinning motor.
\nRegen> Drive is enabled and synchronizing to the line.<\/td>\n<\/tr>\n
StoP<\/b><\/td>\nStop or holding zero speed<\/b><\/td>\nENABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive is holding the motor at zero speed.
\nRegen> Drive is enabled but the AC voltage is too low or DC Bus voltage is still rising or falling.<\/td>\n<\/tr>\n
triP<\/b><\/td>\nTripCondition<\/b><\/td>\nDISABLED<\/b><\/td>\n<\/tr>\n
<\/td>\nDrive has tripped and no longer controlling the motor. Trip code appears on upper display.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n