Renishaw RCU10, Installation And User Manual, Page: 120 / 202

Compensation system status information and diagnostics D-3
D.2 Error descriptions
There are four levels of error supported by the RCU10 firmware. These are, starting with
the most critical:
1. System errors (SE)
2. Errors (E)
3. Warnings (W)
4. Sensor failure
System errors (SE) indicate a critical system failure. It cannot be cleared by asserting
the Reset line on the Auxiliary I/O connector. These errors indicate a loss of firmware
integrity and safe operation cannot be reliably restarted. System errors can only be
cleared by a system reset (power cycling).
Errors (E) indicate any critical failure that does not affect the RCU10 firmware integrity, or
the safety of internal operations. Errors can be cleared by removing the source of the
fault and then asserting the
Reset line on the Auxiliary I/O connector to allow normal
operation to be restarted. After a single error event is detected, the error condition is
latched until the
Reset signal is asserted, and the condition that caused the error has
disappeared.
Suspend conditions indicate states where the compensator has not fully completed the
compensation adjustment, such as waiting to reference the axis, injecting pulses after a
compensation process or a compensation failure. Error clear or system reset is not
required to deactivate the
Suspend line.
A Warning (W) condition indicates any other error condition that requires attention, but
will not compromise the safety or the accuracy of the feedback signals. The warning
condition is not persistent and will disappear when the reason for causing it is cleared.
Error clear or system reset is not required to deactivate the
Warning line.
A Sensor failure condition indicates real-time problems with a specific sensor. It will
create a Warning output signal in the advanced mode of error operation. Sensor failure
will only propagate to an Error if the sensor is assigned a role in a compensation process.
As the sensor network is shared between all RCU10 units in a specific installation, sensor
failures may be indicated on every unit (dependent upon allocation).