Warnings do not lead to an automatic shutdown

Many areas are monitored in connection with operating modes and parameter settings. As a result, if a state is discovered which is still allowed by the order of operation, but in continuous operation generates an error and thereafter leads to shutdown of the drive, a warning will be generated in the case where this state appears again.

Warning Classes

The warning class is evident from the diagnostic message

Warnings can be separated into 2 classes. They differentiate if the drive will perform an automatic response with the appearance of a warning.

Fig. 2-11: Division of the Warning Classes

Warnings can not be externally deleted.

E219 Warning Drive temp. surveillance defective

Temperature monitoring checks to see if the measured drive controller 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 E219 Warning Drive temp. surveillance defective will appear for 30 seconds. Afterwards the drive will be brought to a standstill according to the selected error response and message F220 Bleeder overload shutdown will be generated.

Cause:
1. Sensor not connected to the DRP3 circuit board.

2. Broken cable in the drive controller, or defective sensor.

Remedy:
Exchange or repair the drive controller.

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.

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 are 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

E248 Interpolation acceleration = 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 are active.

The E248 warning is issued if the employed acceleration specification is 0. Possible acceleration specifications are:

· S-0-0260, Positioning acceleration

· S-0-0042, Homing acceleration

· S-0-0138, Bipolar acceleration limit value

Cause:
A velocity that is used for approaching a target position is specified in the S-0-0259, Positioning velocity parameter for the "drive-internal interpolation" and "relative drive-internal interpolation" modes. Message E249 is generated if this velocity is greater than the permissible maximum value S-0-0091, Bipolar velocity limit value. At the same time, bit 5 of S-0-0012, Class 2 diagnostics is set.

Remedy:
Reduce the value of S-0-0259, Positioning 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

The motor is too hot. The motor temperature, which is displayed in parameter S-0-0383, Motor temperature, has exceeded the value in S-0-0201, Motor warning temperature. Warning E251 is generated. If the temperature increases above the value in S-0-0204, Motor shutdown temperature, error F219 Motor overtemp. shutdown will be generated. The values for parameters S-0-0201, Motor warning temperature and S-0-0204, Motor shutdown temperature are set at 140°C and 150°C for MKD and MHD motors respectively. Set MHD, MKD and MKE motors to 145°C or 155°C.

Cause:
The motor became overloaded. The effective torque required of the motor was above the permissible continuous standstill torque for too long.

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

Cause:
In "Drive-controlled interpolation" operating mode, a check is performed to see whether the specified S-0-0258, Target position, is within the possible travel region of the drive. This is defined by parameters S-0-0049, Positive position limit value and S-0-0050, Negative position limit value. Message E253 is generated if the target position lies outside of the travel range. Additionally, warning bit 13 is set in S-0-0012, Class 2 diagnostic.

Remedy:
Check the specified S-0-0258, Target position and correct it, if necessary.

E255 Feedrate-Override S-0-0108 = 0

The travel velocity used in drive-controlled travel commands can be changed with parameter S-0-0108, Feedrate override.  his warning is given if the value of this parameter is 0, since the drive cannot then follow command values.

Cause:
1. The control system's feed potentiometer is set to zero or is being evaluated incorrectly.

2. The parameter was set to an incorrect value.

Remedy:
For 1. Check the feed potentiometer.

For 2. Set the parameter to the correct value for the application.

E257 Continuous current limit active

The thermal controller load is monitored. If a rated current profile is demanded of the drive controller which would require too high a power  ransistor load over time (too much warming of the power output stage), the drive controller will react by dynamically reducing the effective peak current. This warning will be given at the same time. Parameter P-0- 4046, Active peak current is reduced. Before the peak current is actually limited, the advance warning message E261 Continuous current limitation prewarning should have been generated.

Cause:
The drive controller was overloaded.

Remedy:

1. Check the drive layout.

2. Reduce acceleration.

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.

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 paramete  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 limiting 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  iven 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:
A component that is connected to the HVE or HVR power supply unit reports a malfunction.

Remedy:
Check the option module, and replace it if necessary.

Cause:
The regenerated load of the drives is excessive.

Remedy:
Reduce permitted delays. Use a drive controller with smaller peak currents.

E326 Bus power overload

Error will be stored for no more than 500 ms!

Cause:
The input power required by the drives is excessive.

Remedy:
Reduce the permissible acceleration. Use drive controller with smaller peak current.

E350 Heat sink overtemp. warning power supply unit

The permissible heatsink temperature has been reached. Temperature prewarning contact open. Power off after 30 seconds.

Cause:
Load too high, ambient temperature too high. Cooling air is blocked, blower in unit is defective.

Remedy:
Reduce load, reduce control cabinet temperture, check cooling air ducts, replace unit.

Cause:
75% of the permissible bleeder ON time has been reached due to excessive regenerated power.

Remedy:

· permissible acceleration (delay) must be reduced

· reduce drive speed

· reduce peak current of the drive

E353 Diagnostic message power supply erroneous

The power supply unit HVE or HVR cyclically sends status and error messages via a serial connection to the connected controller. If the controllers do not receive several sequential messages, then this warning is generated.

Cause:
1. serial interface of power supply unit is defective

2. break in serial connection lines

3. serial interface of controller is defective

Remedy:
On 1. replace power supply unit.

On 2. check and replace bus cable, if necessary

On 3. replace controller, if necessary

E387 Control voltage supply fault power supply unit

With HVE only !

Cause:
The power voltage supply in the HVE exceeds permissible tolerance (3x 380 ... 480V, ± 10 % ).

Remedy:
Check mains fuse in control cabinet and replace, if necessary.

E410 Slave not scanned or adress 0

While the SERCOS ring is being initialized in communications phase 1, each slave which is to participate in the additional phase uptake mus  be addressed by the SERCOS master. Slaves which are not addressed or which have been set to drive address "0" indicate this by generating warning E410. Communication with these slaves in higher communications phases is not possible. They work only in the repeater mode.

Cause:
The slave was not scanned in phase 1, or "0" address is set.

Remedy:
· Set the correct slave address.

· Check the SERCOS master configuration.

E825 Overvoltage in power stage

The DC bus voltage has reached impermissibly high values. (Ud > 475V). The drive controller was switched to torque-free operation so as not to endanger the drive's power amplifier.

Cause:
The energy regenerated by a braking drive controller (a main-spindle drive, for example) cannot be converted by the bleeder resistors quickly enough.

Remedy:
The braking slope should have a flatter parameter, or the bleeder capacity can be increased by adding an additional bleeder.

E826 Undervoltage in power section

If bit 3 of the P-0-0118, Power off on error parameter has been set, an undervoltage condition will be handled as a "fatal warning", and the motor-driven operation will be shut down. 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.

E829 Positive Position Limit exceeded

The drive received a command value which resulted in an axis position outside the positive travel range. The axis was brought to a standstill by setting the velocity command value to zero. A class 1 diagnostic error is not generated. The drive will automatically follow command values which lead into the allowable range after they are entered. "Handle travel range exceeded as warning" is set in bit 2 of parameter S-0-0090, Command value transmit time (TMTSG).

Remedy:
Enter command values which lead back into the allowable range.

E830 Negative Position Limit exceeded

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

Remedy:
Enter command values which lead back into the allowable range.

E834 Emergency-Stop

The emergency stop switch was pressed, thus causing the drive to perform the emergency stop function that has 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 extinguish.

E843 Positive Limit Switch activated

The drive has been provided with a command value that leads to an axis position outside the positive travel range. The axis is topped by setting the velocity command value to zero. A status class 1 error is not generated. The drive automatically follows command values that lead back into the valid range. Bit 2 of P-0-0090, Travel limit parameter is set to "Overtravelling is handled as a warning".

Cause:
Positive limit switch has been actuated.

Remedy:
Specify command values that lead back to the valid range.

E844 Negative Limit Switch activated

The drive has been provided with a command value that leads to an axis position outside the negative travel range. The axis is topped by setting the velocity command value to zero. A status class 1 error is not generated. The drive automatically follows command values that lead back into the valid range. Bit 2 of P-0-0090, Travel limit parameter is set to "Overtravelling is handled as a warning".

Cause:
Negative limit switch has been actuated.

Remedy:
Specify command values that lead back to the valid range.