Distributed clock technique Ø All of the IO device has a local clock Ø Real-time Ethernet communication by automatically and continuously synchronize all other clocks Ø communications with the time offset can be compensated Ø The maximum deviation between all the clocks are less than 100 ns Ø Distributed clock time as the current system time, because it can be used throughout the system.
Timestamp Technology
Ø timestamp data type has a time value of additional transmission Ø use the system time value is usually time for the process to provide accurate time information data Ø stamp can be used to record signal input time for the output signal controls the output of the time.
Oversampling
■ oversampling IO board can be achieved in a single scan input value within a time interval of several other samples, ■ The data recorded in an array ■ a scan cycle in all transferred to the controller ■ For the output value to the output change in a scan cycle times ■ oversampling factor describes a communication cycle sampling (changing) the number of ■ In general, under the conditions of the communication cycle time, can easily reach 200 kHz sampling rate.
