Interpret a Timestamp
The timestamp
A sequence of characters, denoting the date and/or time at which a certain event occurred. is based on the EtherCAT Ethernet ofr Control Automation Technology.
EtherCAT® is an open, high-performance Ethernet-based fieldbus system.
The development goal of EtherCAT is to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs. system time.
For this value to make sense, the distributed clock Clock signal. must be activated in the drive In electrical engineering, a drive is an electronic device to provide power to a motor or servo.
Control device for regulating the speed, torque and position of a motor.
A unit controlling a motor using the current and timing in its coils. (see Distributed Clock tab) and in the EtherCAT master.
Figure 1: PLC Timestamp Related to Fast Input Event
- The timestamp returned is relative to the beginning of the cycle in which the Fast Input The inputs are taken into account at each cycle depending on the system periodicity (i.e., each millisecond).
Under certain circumstances, this can be insufficient when more accuracy is needed or if a quick response is required from the system.
To fill the gap, a drive may have some Fast Input connections (generally one or two).
When an event happens that triggers a Fast Input (e.g., when a sensor sends a rising edge), the detection of a signal occurs faster.
This can be 1000 times more accurate than the system periodicity.
The timestamp associated with this input can be provided to the IPC to take corrective action. is triggered.
- It is called PLC Programmable Logic Controller - A digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines.
Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events. timestamp because it is the value used in PLC programs The act of performing a sequence of instructions or commands..
