The recording can be triggered by any of the following alternatives.
- Triggering according to the state change of any of the binary channels of the disturbance recorder. The level sensitivity can be set with the Level trigger mode parameter of the corresponding binary channel.
- Triggering on limit violations of the analog channels of the disturbance recorder (high and low limit)
- Manual triggering via the Trig recording parameter (LHMI or communication)
- Periodic triggering
Regardless of the triggering type, each recording generates the Recording started and Recording made events. The Recording made event indicates that the recording has been stored to the nonvolatile memory. In addition, every analog channel and binary channel of the disturbance recorder has its own Channel triggered parameter. Manual trigger has the Manual triggering parameter and periodic trigger has the Periodic triggering parameter.
Triggering by binary channels
The input signals for the binary channels of the disturbance recorder can be formed from any of the digital signals. A change in the status of a monitored signal triggers the recorder according to the configuration and settings. Triggering on the rising edge of a digital input signal means that the recording sequence starts when the input signal is activated. Correspondingly, triggering on the falling edge means that the recording sequence starts when the active input signal resets. It is also possible to trigger from both edges. In addition, the monitored signal can be non-triggering. The trigger setting can be set individually for each binary channel of the disturbance recorder with the Level trigger mode parameter of the corresponding binary channel.
Triggering by analog channels
The trigger level can be set for triggering in a limit violation situation. The limit values can be set with the High trigger level and Low trigger level parameters of the corresponding analog channel. Both high-level and low-level violation triggering can be active simultaneously for the same analog channel. If the duration of the limit violation condition exceeds the filter time of approximately 50 ms, the recorder triggers. In case of a low-level limit violation, if the measured value falls below approximately 0.05 during the filter time, the situation is considered to be a circuit breaker operation and therefore, the recorder does not trigger. This is useful especially in undervoltage situations. The filter time of approximately 50 ms is common to all the analog channel triggers of the disturbance recorder. The value used for triggering is the calculated peak-to-peak value. Either high or low analog channel trigger can be disabled by setting the corresponding trigger level parameter to zero.
Manual triggering
The recorder can be triggered manually via the LHMI or via communication by setting the Trig recording parameter to "Trig".
Periodic triggering
Periodic triggering means that the recorder automatically makes a recording at certain time intervals. The interval can be adjusted with the Periodic trig time parameter. If the value of the parameter is changed, the new setting takes effect when the next periodic triggering occurs. Setting the parameter to zero disables the triggering alternative and the setting becomes valid immediately. If a new non-zero setting needs to be valid immediately, the Periodic trig time parameter should first be set to zero and then to the new value. The time remaining to the next triggering can be monitored with the Time to trigger monitored data which counts downwards.