National Instruments Deterministic Ethernet Expansion Chassis NI 9144 User Manual

Also see for NI 9144: User guide User manual Getting started guide

National Instruments Deterministic Ethernet Expansion Chassis NI 9144 User Manual Manual pdf 12 page image

NI 9144 User Guide and Specifications 12 ni.comResetting the NI 9144 Network ConfigurationTo reset the NI 9144 network configuration, unplug and replug in theNI 9144 chassis.Safe-State OutputsThe NI 9144 has a safe state that lies between its configuration andoperational states. When moving out of the operational state down to theconfiguration state, during normal operation or in case of a serious error,the NI 9144 passes through this safe state.The safe state forces the data of output modules to pre-defined safe values,which are set by default to output zero volts for the default channelconfiguration. It is possible to change the safe values as needed by writingto the appropriate object dictionary entries for your output module.Slave Timing ModesThere are two fundamental timing modes the NI 9144 can operate in:free-run and synchronized using the EtherCAT distributed clock throughDC synchronized mode.In free-run mode the NI 9144, by default, runs its conversion cycle asquickly as the slowest module allows. It is possible to slow the free-runconversion cycle down by writing a minimum cycle time in nanoseconds tothe NI 9144’s index 0x3001.1.In DC synchronized mode the NI 9144 begins each conversion cycle on asignal from the EtherCAT Master/scan engine. If the external cycle time istoo fast for the given module configuration, the NI 9144 signals an error.Updating your FirmwareFirmware updates are performed via the File over EtherCAT (FoE)download protocol. All NI firmware update files have a suffix of.foe andhave internal identification information that guides the NI 9144 during theupdate. Refer to your specific master software documentation for theprocedure of sending FoE downloads.The NI 9144 firmware update does not use the filename or passwordinformation.