ADLINK PCI-8154 - Manual (Page 81)

Operation Theory 71
4.3.3 In position signal
The in-position signal is an output signal from motor driver. It tells
motion controllers a motor has been reached a position within a
predefined error. The predefined error value is in-position value.
Most motor drivers call it as INP value. After motion controller
issues a positioning command, the motion busy status will keep
true until the INP signal is ON. Users can disable INP check for
motion busy flag. If it is disabled, the motion busy will be FALSE
when the pulses command is all sent.
4.3.4 Servo alarm signal
The alarm signal is an output signal from motor driver. It tells
motion controller that there has something error inside servo
motor or driver. Once the motion controller receives this signal, the
pulses command will stop sending and the status of ALM signal
will be ON. The reasons of alarm could be servo motor’s over
speed, over current, over loaded and so on. Please check motor
driver’s manual about the details.
The logic of alarm signal must be set correctly. If the alarm logic’s
setting is not the same as motor driver’s setting, the ALM status
will be always ON and the pulse command can never be output-
ted.