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epics-motor / motorSmarAct

EPICS motor drivers for SmarAct controllers
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MCS2: unable to decode no-sensor-present error #14

Closed kmpeters closed 2 years ago

kmpeters commented 2 years ago

If an axis is disconnected when the IOC starts, no-sensor-present errors occur during startup:

2022/04/06 16:32:00.198 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.199 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.199 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.200 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.201 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.202 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.203 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.204 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.205 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.205 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.206 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.207 MCS2Axis::clearErrors: Unable to decode 259
2022/04/06 16:32:00.208 MCS2Controller::MCS2Controller: Device Name: "MCS2-00000807"
259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"259,"no sensor present"

This error should be handled in the following switch statement:

https://github.com/epics-motor/motorSmarAct/blob/56ef95f2b97a52c186457ec29f4db6ce0c4baa12/smarActApp/src/smarActMCS2MotorDriver.cpp#L124-L146

It isn't obvious to me why the no-sensor-present error number is positive but the others are negative.