E221 Warning Motor temp. surveillance defective

Temperature monitoring checks to see if the measured motor temperature is within reasonable bounds. If it determines that it is lower than -10°C, then it is assumed the measuring unit is defective. Warning
E221 Warning Motor temp. surveillance defective will appear for 30 seconds. Afterwards the drive controller will be brought to a standstill according to the selected error response and message F221 Error Motor temp. surveillance defective will be generated.

Cause:

1. Motor temperature sensor not connected.

2. Broken cable.

3. Defective sensor.

4. Broken cable in drive controller.

Remedy:

For 1. Connect the sensor to the drive controller and to the motor (see project planning specifications for the motor).

For 2. Exchange the wiring between the drive controller and the motor.

For 3. Exchange the motor.

For 4. Exchange the drive controller.

E225 Motor overload

The maximum possible motor current is reduced in order to protect the motor from being destroyed. If a current flows in the that is greater than 2.2 times the motor current at standstill S-0-0111, the maximum possible motor current (motor peak current S-0-0109) is reduced. With 4-fold motor current at standstill, the reduction starts after 400 ms. With 5-fold current it starts earlier, and with 3-fold current later.

The E225 Motor overload warning is issued when the motor peak current is reduced by the limitation. The reduction also has an effect on the active permanent current P-0-4045.

E226 Undervoltage in power section

If bit 5 of the P-0-0118, Power off on error parameter has been set, an undervoltage condition will be handled as a nonfatal warning. The drive issues this warning if the drive enabling signal is present and the DC bus voltage message disappears.

Cause:

Power supply unit is switched off or mains failure occurs while the drive enabling signal is set.

Remedy:

Switch off the drive enabling signal before you switch off the power supply unit.

E231 No jogging direction selected

During jog operation to the position limit, this warning is generated, when no unambiguous direction for jogging is selected. This happens, when the parameter P-0-4056 Jog inputs contains the value 00b or 11b.

Remedy:

Select an unambiguous jogging direction, either positive or negative, in P-0-4056 or, with parallel interface,
via the hardware inputs.

E247 Interpolation velocity = 0

The drive-internal position command value interpolator is active if

· the "drive-internal interpolation" mode,

· the "relative drive-internal interpolation" mode,

· drive-controlled homing,

· drive halt is active.

The E247 warning is issued if the employed velocity specification is 0.

Possible velocity specifications are:

· S-0-0259, Positioning Velocity

· S-0-0041, Homing velocity

· S-0-0091, Bipolar velocity limit value

Cause:

The drive internal position command interpolator (profile generator) is active. It has been given the acceleration = 0. Without acceleration, it can never reach a given speed.

Operation modes with drive internal position command generation:

1. Drive-internal interpolation

2. Relative drive-internal interpolation

3. Drive-controlled homing

4. Drive Halt

5. Process block mode

Remedy:

Input a reasonable value > 0 for the employed acceleration. Possible acceleration specifications, depending from the operation mode, are:

For 1. and 2.: S-0-0260, Positioning acceleration >0

For 3.: S-0-0042, Homing acceleration >0

For 4.: S-0-0138, Bipolar acceleration limit value >0

For 5.: P-0-4008, Process block Acceleration >0

Cause:

In the operation modes "Drive-internal interpolation" and "Relative drive-internal interpolation", the velocity specified in the S-0-0259, Positioning velocity parameter is used for positioning. In the "process block" operation mode, this velocity is taken for positioning with limited speed. If velocity specified there is greater than value in S-0-0091, Bipolar velocity limit value, the message E249 is generated. Then, bit 5 is set in S-0-0012, Class 2 diagnostics.

Note: The warning E249 is only generated when the parameter S-0-0259 is transferred cyclically via the
command communication (SERCOS, Profibus-DP, Interbus, ...).

Remedy:

Reduce S-0-0259, Positioning Velocity or, for process block mode, S-0-4007, Process block Velocity.

E250 Drive overtemp. prewarning

The temperature of the heatsink in the drive controller has reached the maximum permissible temperature. The drive controller follows the command value input for a period of 30 seconds. This makes it possible to bring the axis to a standstill with the control system while keeping true to the process (for example, close the operation, leave the collision area, etc.). After 30 seconds, the response set in parameter P-0-0119, Best possible deceleration will be performed by the drive controller.

Cause:

1. Failure of the drive's internal blower.

2. Failure of the control cabinet's climate control.

3. Incorrect control cabinet dimensioning in regards to heat dissipation.

Remedy:

For 1. If the blower fails, exchange the drive controller.

For 2. Install climatization feature in the cabinet.

For 3. Check the dimensions of the control cabinet.

E251 Motor overtemp. prewarning

As soon as the temperature warning threshold (145°C) is exceeded, the warning E251 is output, and the drive keeps on following the command value. This state can last for a long time without powering down. Only when the temperature error threshold is exceeded, an immediate powering down will take place. See also
F219 Motor Overtemperature Shutdown.

Cause:

The motor is overloaded. The effective torque required from the motor was above the allowable standstill continuous torque for too long.

Remedy:

Check the installation of the motor. For systems which have been in use for a long time, check to see if the drive conditions have changed (in regards to pollution, friction, moving components, etc).

Cause:

The braking resistance (bleeder) in the amplifier is charged with the reflected energy from the motor by about 90%. The bleeder overtemperature warning shows that an overload of the bleeder is expected if the feedback energy increases on and on.

Remedy:

Reduce the acceleration value or velocity. Check the drive installation.

E253 Target position out of travel range

In operation modes with drive ontrolled interpolation, the drive checks before the move whether the specified
S-0-0258, Target position, is within the possible travel range of the drive. This range is defined by the parameters S-0-0049, Positive position limit value and S-0-0050, Negative position limit value. The position limit check is activated in the parameter S-0-0055, Position polarities with bit 4.

Cause:

The target position lies beyond the position limits, and the position limit check is activated.

Results:

· This warning message, E253, appears.

· The drive stops.

· The drive does not accept the target position or the process block.

· In S-0-0012, Class 2 diagnostic warning bit 13 is set.

Remedy:

1. For the Drive controlled interpolation mode, input the S-0-0258,Target position only within the position limits.

2. For the Relative drive controlled interpolation mode, do the same, outgoing from the actual position.

3. For the Process block mode, input the S-0-4006 Process block target position only within the position limits.

4. For relative process blocks, do the same, outgoing from the actual position.

5. Check the position limit values. Moreover, the positive position limit value must be greater than the negative position limit value.

6. If you don’t need the position limit check, de-activate it, e.g. in modulo mode.

E254 Not homed

If absolute positions are selected while in a positioning operation mode, the control drive must be homed to a reference position. If this is not the case, an absolute position cannot be reached. The drive rejects this positioning command and stops. The warning E254 will be given.

Cause:

Absolute positioning was selected without the drive being referenced.

Remedies:

1. Do the homing (referencing) command with the drive or

2. Do only relative positioning.

E255 Feedrate-override S-0-0108 = 0

With the parameter S-0-0108, Feedrate override, the travel velocity of all in drive-controlled travel commands can be changed proportionally (in %). If the value of this parameter is 0, the travel velocity is also 0. With velocity = 0, however, the drive can never go anywhere. It cannot follow the applied command values.

Causes:

1. The parameter S-0-0108, Feedrate override is 0.

2. S-0-0259, Positioning Velocity is 0.

3. The P-0-4007, Process block velocity is 0 with the selected process block.

4. For devices with analog inputs: Feedrate override via analog input is activated, and the voltage there is 0.

5. The feed potentiometer of the connected control system is at 0 or is being evaluated incorrectly. Like 4.

Remedies:

For 1.: Set Feedrate override > 0, so that the drive moves. Full speed is attained with 100% .

For 2.: Set S-0-0259 to the suitable value > 0 for your application.

For 3.: Set P-0-4007 to the suitable value > 0 for your application.

For 4.: Apply a voltage > 0 proportional to the desired speed, +10V corresponds to 100 % (full) speed. Alternative: De-activate Feedrate override.

For 5.: Turn the feed potentiometer cautiously, check the analog signal and the evaluation for it.

Cause:

1. For protection against mechanical overload, the maximum torque can be limited by the S-0-0092,
Bipolar torque/force limit value parameter. If the actual value of this parameter is equal to 0, the motor does not develop torque and does not follow the given command values.

2. Torque reduction is set via an analog channel, and the applied voltage amounts to 10 V.

Remedy:

For 1. Set the torque limit to a value greater than 0.

For 2. Establish an analog voltage smaller than 10 V.

E257 Continuous current limit active

The drive controller sets the peak current available for 400 ms. Thereafter, the continuous current limit becomes active and dynamically limits the peak current to the continuous current.

Cause:

More continuous torque was required than was available.

Remedy:

1. Check the drive installation.

2. Check the installation of the motor. For systems which have been in use for a long time, check to see whether the drive conditions have changed in regards to

· pollution

· friction

· moved masses

Cause:

A positioning block was selected for which there is no set target position or positioning velocity, etc.

Remedy:

Select another positioning block or enter the required data.

E259 Command velocity limit active

In the position control and velocity control operating modes, the effective velocity command value is limited to the value in parameter S-0-0091, Bipolar velocity limit value. The warning is given if the resulting velocity command value reaches this limit.

Cause:

Parameter S-0-0091, Bipolar velocity limit value was set too low.

Remedy:

In normal operating conditions, set parameter S-0-0091, Bipolar velocity limit value to a value 10% greater than the NC effective velocity.

E261 Continuous current limit prewarning

Digital drives are monitored by a continually operating temperature model. If the thermal load reaches 100%,
the continuous current limit will be activated shortly thereafter. Before the torque is reduced, a continuous current limit early warning is given via a switching threshold, which is determined by parameter P-0-0127, Overload warning. To deactivate the warning, enter P-0-0127 = 100% into the parameter.

Cause:

The drive controller was overloaded.

Remedy:

1. Check the drive layout.

2. Reduce acceleration.

3. Increase the switching threshold in parameter

P-0-0127, Overload warning

4. With systems which have been used for longer periods of time, check to see if drive controller conditions have changed in regards to:

- Friction

- Components which have been moved

- Feed during processing.

Cause:

The value given to the drive for S-0-0036, Velocity command value was greater than permissible.

Remedy:

It is limited to S-0-0091, Bipolar velocity limit value.

Cause:

When using the operating mode "position control with process blocks", the target position of the selected additive process block will be verified to see whether it lies within the numerical range. This was not the case.

Remedy:

1. Check the target position and correct if necessary.

2. Select the position data display in modulo format.

E300 Processor watchdog

The processor in the drive controller is equipped with a watchdog. Inside the drive controller, the processor must show activity regularly.

What has happened?

The wachdog time has elapsed, but the processor has not shown activity during this time. A safe running of the
firmware program is no more guaranteed.

Cause:

The processor has been overloaded, or a severe mistake in the firmware has occured. The result is that the processor does not do certain interrupt service routines any more.

Remedy:

Please contact the INDRAMAT customer service. Explain exactly, under which circumstances the error has occured. The firmware should be exchanged.

Cause:

In the parameter channel of the field bus (profibus), an error has occurred.

Cause:

In the process data channel of the field bus (profi bus), an error has occurred.

Cause:

In the FMS channel of the field bus (profi bus), an error has occurred.

Cause:

During execution of a field bus command, an error has occurred.

E408 Invalid addressing of MDT-data container A

This warning indicates an error during the index check in the multiplex channel. During the cyclical data exchange, the index for the access to the list S-0-0370, Configuration list for the MDT data container surveyed, whether it points to a non-initialised field in the list. If it does, this warning is generated.

E409 Invalid addressing of AT-data container A

This warning indicates an error during the index check in the multiplex channel. During the cyclical data exchange, the index for the access to the list S-0-0371 is surveyed, whether it points to a non-initialised field in the list. If it does, this warning is generated.

E825 Overvoltage in power stage

The DC bus voltage is too high.

Cause:

1. During braking (decelerating): the energy reflected from the mechanical system via the motor was so high for a moment that it could not be sufficiently dissipated to heat by the braking resistor (bleeder). The regenerated current could not be drained and therefore charged the DC bus, so that the voltage there has become too high.

2. The mains voltage (AC input) is too high.

Result:

In case of overvoltage, the motor is switched to torque-free operation. As soon as the DC Bus voltage falls again below the maximum allowable value, the controller will be turned on again.

Remedy:

For 1. Reduce the acceleration values.

Check the drive controller layout, if necessary. Install an auxiliary bleeder, if necessary.

For 2. Check the mains supply voltage (AC/3phase).

WARNING

-> Danger of high-voltage shock!

Care for protection against accidental touch.

E826 Undervoltage in power section

If the bit 3 is set in the parameter P-0-0118, Power off on error, the undervoltage is treated as "fatal warning" with shutdown of the drive operation. If the drive enable is on at the same time, and the DC bus voltage indication goes down, the drive displays this warning.

Cause:

Switching off the power supply or mains failure while the drive enable is on.

Remedy:

Switch off the drive enable before switching off the supply unit.

E829 Positive position limit exceeded

The drive has received a command value which resulted in an axis position outside the positive travel range. The axis has been brought to a standstill by setting the velocity command to zero. A class 1 diagnostic error is not generated. The drive will automatically follow command values that lead back into the allowed range. "Handle travel range exceeded as warning" is set in bit 2 of parameter P-0-0090,
Travel limit parameter.

S-0-0049, Positive position limit value exceeded.

Remedy:

Enter command values which lead back into the allowed range.

Note: Only such command values will be accepted that lead back into the allowed working range. With other command values, the drive will stop again. - The parameter S-0-0057, Position window defines a hysteresis for the travel limits.

E830 Negative position limit exceeded

The drive has received a command value which resulted in an axis position outside the negative travel range. The axis has been brought to a standstill by setting the velocity command to zero. A class 1 diagnostic error is not generated. The drive will automatically follow command values which lead into the allowed range. "Handle travel range exceeded as warning" is set in bit 2 of parameter P-0-0090, Travel limit parameter.

S-0-0050, Negative travel limit value exceeded.

Remedy:

Enter command values which lead back into the allowed range.

Note: Only such command values will be accepted that lead back into the allowed working range. With other command values, the drive will stop again. - The parameter S-0-0057, Position window defines a hysteresis for the travel limits.

E831 Position limit reached during jog

If the position limit monitor is activated and the drive is "IN REFERENCE", then it will be positioned on the position limit during movement by jogging. If the drive is positioned on the position limit or beyond the position limit, the drive stops and signals "Position limit value reached during jog".

Remedies:

1.Move the motor back within the allowed travel area with the jog function or

2. Turn off the position limit monitor.

E834 Emergency-Stop

Pressing the emergency stop switch has caused the drive to perform the emergency stop function that had been selected via the P-0-0119, Best possible deceleration parameter. There is no error message issued to the controller.

Cause:

The emergency stop switch was pressed.

Remedy:

Eliminate the malfunction that led to the activation of the emergency stop switch. The warning will then disappear.

E843 Positive limit switch activated

The drive has received a command value which resulted in an axis position outside the positive travel range. The axis has been brought to a standstill by setting the velocity command to zero. A class 1 diagnostic error is not generated. The drive will automatically follow command values that lead back into the allowed range. Bit 2 of P-0-0090, Travel limit parameter is set to "Overtravelling is handled as a warning".

Cause:

The positive limit switch has been actuated.

Remedy:

Enter command values that lead back into the allowed range.

E844 Negative limit switch activated

The drive has received a command value which resulted in an axis position outside the negative travel range. The axis has been brought to a standstill by setting the velocity command to zero. A class 1 diagnostic error is not generated. The drive will automatically follow command values that lead back into the allowed range. Bit 2 of P-0-0090, Travel limit parameter is set to "Overtravelling is handled as a warning".

Cause:

The negative limit switch has been actuated.

Remedy:

Enter command values which lead back into the allowed range.