F267 Erroneous internal hardware synchronization
Cause:
The drive control is synchronized on the bus interface (SERCOS, Profibus, Interbus, ...). The correct fuction
of the synchronization is monitored. If the average value of the deviation exceeds 5 µs, this error is generated.
Remedy:
Replace drive controller.

F276 Absolute encoder out of allowed window
When turning off the drive controller with an absolute encoder (multiturn), the actual feedback position will be
stored. When powered up, the absolute position given by the encoder is compared with the stored position.
If the deviation is greater than the paramaterized P-0-0097, Absolute Encoder Monitoring Window, the error F276 will appear and be given to the control system.
Cause:
1. Turning on for the first time (invalid stored position)
2. The motor has been moved further than allowed by the parameter in the absolute encoder monitoring window, P-0-0097, while it was turned off.
3. Incorrect position initialization
Remedy:
For 1. Press S1 to reset the error and set the absolute position.
For 2. The motor was moved while turned off and sits outside of its permissible position. Check to see if the displayed position is correct in relation to the machine zero point. Reset subsequent errors.
For 3. An accident may occur by accidental shaft movement.
Check absolute position information. The feedback is defective if the absolute position information is wrong.
The motor should be exchanged and sent to the INDRAMAT Customer Service.

F277 Current measurement trim wrong
This error can only happen during the test of the drive controller at the INDRAMAT factory. The current measurement in the drive controller is calibrated precisely with a test current in the INDRAMAT test department. During this test, correction values outside the projected tolerances have come out.
Cause:
1. Hardware defective in the drive controller
2. The correct current for the calibraton does not flow.
Remedy:
1. Repair the control board.
2. Check the calibration current.

F281 Mains fault
Cause:
The power supply voltage was not present during operation for at least 3 power periods. As a result, the drive controller was brought to a standstill according to the set error response.
Remedy:
Check the power supply connection according to the project planning specifications.

F386 No ready signal from supply module
Cause:
The input BbN „operation readiness from supply unit" at the drive controller is at 24V, that means the connected mains supply unit does not report ready for operation.

F402 Double MDT failure shutdown
The Master Data Telegram (MDT) has not been received in two successive SERCOS or field bus cycles of the drive.
Cause:
1. Optic fibre-bus: Optical link corrupted.
2. Optic fibre bus: Too high damping of the light signals
3. SERCOS: Error in the SERCOS Interface (general)
4. Field bus: Bus connection interrupted/locked up for longer than watchdog time.
5. The bus-master does not send cyclical telegrams any more to the drive. However, these are mandatory in phase 4.
Remedy:
For 1. Check all the fibre optic connections in the SERCOS ring.
For 2. Measure the damping/absorption of the optical cables. The max. loss between TX and RX may not exceed 12,5 dB!
For 3. Replace the SERCOS Interface module in the drive.
For 4. Check the field bus connectors and wiring, signal levels.
For 5. Switch on the master and get the cyclical communication going, see manual for your control.

F407 Error during initialisation of master communication
Upon every power-up, the master communication link between drive processor and field bus processor is checked. Doing this, the version of the field bus firmware is examined, and a communication check between the two microcontrollers is performed. If this communication is not established properly, the initialization will be finished with this error message.

F434 Emergency-Stop
Pressing the emergency stop switch (E-Stop) has caused the drive to perform the emergency stop function that was selected in the P-0-0119, Best possible deceleration parameter. Setting bit 15 of S-0-0011, Class 1 diagnostics causes an error message to be issued to the controller.
Cause:
The emergency stop switch has been pressed.
Remedy:
Eliminate the malfunction that has caused the emergency switch to be actuated, and clear the error.

F629 Positive travel limit exceeded
The drive has received a command value which has led to an axis position outside the positive travel range. The axis has been brought to a standstill with the error response "Set velocity command value to zero". Bit 2 of paramater P-0-0090, Travel limit parameter is set for "Exceeding travel range is an error", or after exceeding the position limit a drive control command has been started (such as the drive-controlled homing procedure).
Cause:
S-0-0049, Positive position limit value exceeded.
Remedy:
1. Check S-0-0049, Positive position limit value
2. Check the software limits of the control system
3. Activate the axis after the error response
Procedure:
· Clear the error.
· If the power supply was turned off, turn it back on.
· Move the axis into the permissible working range.
Note: Only such command values will be accepted which 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.

F630 Negative travel limit exceeded
The drive has received a command value which has led to an axis position outside the negative travel range. The axis has been brought to a standstill with the error response "Set velocity command value to zero".
Bit 2 of paramater P-0-0090, Travel limit parameter is set for "Exceeding travel range is an error", or after
exceeding the position limit a drive control command has been started (such as the drive-controlled homing procedure).
Cause:
S-0-0050, Negative position limit value exceeded.
Remedy:
1. Check S-0-0050, Negative position limit value.
2. Check the software limits of the control system.
3. Activate the axis after the error response.
Procedure:
· Clear the error.
· If the power supply was turned off, turn it back on.
· Move the axis into the permissible working range.
Note: Only such command values will be accepted which 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.

F634 Emergency-Stop
Pressing the emergency stop (E-Stop) switch has caused the drive to stop by setting the velocity command value to zero. An error is reported in the S-0-0011, Class 1 diagnostics parameter.
Cause:
The emergency stop switch has been pressed.
Remedy:
Eliminate the malfunction that has caused the emergency switch to be actuated, and clear the error.

F643 Positive travel limit switch detected
The positive travel limit switch has been encountered. The axis has been brought to a standstill with the "Set velocity command value to zero" error response.
Bit 2 of parameter P-0-0090, Travel limit parameter is set for "Exceeding travel range as error", or a drive control command has been started (such as the drive-controlled homing procedure) with the limit switch already actuated.
Cause:
The positive travel limit switch is detected.
Remedy:
1. Reset the error.
2. Turn the power supply on again.
3. Move the axis into the permissible travel range.
Note: The drive will not accept command values which lead out of the permissible travel range. Entering these
command values in the drive controller will result in this error.

F644 Negative travel limit switch detected
The negative travel limit switch has been encountered. The axis has been brought to a standstill with the
"Set velocity command value to zero" error response.
Bit 2 of parameter P-0-0090, Travel limit parameter is set for "Exceeding travel range as error", or a drive control command has been started (such as the drive-controlled homing procedure). with the limit switch already actuated.
Cause:
The negative travel limit switch is detected.
Remedy:
1. Reset the error.
2. Turn the power supply on again.
3. Move the axis into the permissible travel range.
Note: The drive will not accept command values which lead out of the ermissible travel range. Entering these command values in the drive controller will result in this error.

F822 Encoder 1 failure: signal too small
For the high resolution evaluation of a position encoder, the analog signals of the transducer are used.
These are monitored for 2 criteria:
1. The pointer length resulting from sine and cosine signal must be > 1V.
2. The max. pointer length from sine and cosine signal must not exceed 11.8 V.

Note: The error cannot be cleared in communication phase 4 (operating mode). Before clearing the error, you are obliged to switch to communication phase 2 (parameter mode).
Causes:
1. Feedback Cable defective
2. Transmission of the feedback signals disturbed
3. Feedback defective
Remedies:
1. Check the cable to the measuring system
2. Place the cable apart from the motor power cable. The screen must be connected to the housing of the drive controller.
3. Check the measuring system; replace it, if necessary.

F860 Overcurrent: short in power stage
The current in the power transistor bridge has exceeded twice the peak current of the drive. As a result, the drive will immediately switched to a torque-free state. An optional brake is immediately activated.
Cause:
1. Short circuit in the motor cable.
2. Defective power section of the drive controller
3. The current regulator was parameterized with wrong values.
Remedy:
For 1. Check the motor cable for a short.
For 2. Exchange the drive controller.
For 3. The current regulator parameters should not deviate from the default values of the feedback.

F870 +24Volt DC error
The drive controller requires a 24-V control voltage. The drive's torque is released immediately when the
maximum permissible tolerance of +-20% is exceeded. An optional blocking brake is activated.
Cause:
1. Defective cable for the control voltages.
2. 24-V power supply overload.
3. Defective power supply unit.
4. Short-circuit in the emergency stop circuit.
Remedy:
Ref. 1. Check and, if necessary, replace the cable and connections of the control voltages.
Ref. 2. Check the 24-V power at the power supply unit.
Ref. 3. Check the power supply unit.
Ref. 4. Check the emergency stop circuit for a short-circuit.
Note: This error can only be cleared in parametrization mode (phase 2). As a result of this error, the encoder emulation is switched off.

F873 Power supply driver stages fault
The voltage supply of the driver stage is monitored, and if the voltage is too low, the drive is turned off.
Cause:
The voltage supply of the driver stage is too low.
Remedy:
Exchange drive controller.

F878 Velocity loop error
The velocity loop monitor will appear when the following conditions occur simultaneously:
· The current command value is at the peak current limit.
· The difference between the actual velocity and the command velocity is greater than 10 % of the maximum motor velocity.
· actual speed > 1.25 % of maximum speed
· Command and actual acceleration have different qualifying signs.
Cause:
1. Motor cable is connected incorrectly.
2. Defective controller section of the drive
3. Defective feedback
4. Velocity loop paramaterized incorrectly
5. Incorrect commutation offset
Remedy:
For 1. Check the motor cable connection.
For 2. Exchange the drive controller.
For 3. Exchange the motor.
For 4. Check the velocity controller to see whether it is within operational parameters.
For 5. Exchange the motor.

F879 Velocity limit S-0-0091 exceeded
In torque control, the actual velocity is monitored. This error is generated if the programmed velocity in the S-0-0091, Bipolar velocity limit value parameter is exceeded by the 1.125-fold value or a minimum of 100 rpm (rotary motor) or by 100 mm/min (linear motor).
Cause:
The torque command value was for too long a time greater than the load torque. This causes the actual speed to increase up to the maximum possible motor speed.
Remedy:
Assign the correct torque command value for the required task. Reduce the S-0-0092, Bipolar torque/force limit value parameter value.

F895 4kHz fault
The 4 kHz signal is synchronized with the software processing for creation of the resolver signal. This error message is created when synchronization occurs improperly.
Cause:
1. The synchronization of the resolver controller voltage is invalid in regards to the software.
2. The error can be caused by an electrical discharge.
Remedy:
For 1. Exchange the drive controller and return it for testing.
For 2. Cycle the power (off and on again). If this is not successful, exchange the drive controller.