Emerson Ovation 5X00238G13 Sequence of Events Module

Emerson Ovation 5X00238G13 is a Sequence of Events module in the Ovation Distributed Control System (DCS). It provides 16 digital channels to monitor the open or closed state of digital inputs or contacts in the field. This module rejects changes of state that last less than 4 milliseconds.

The module performs event tagging and chatter control for each input channel. The Ovation Controller writes a channel event tagging mask to the Electronics module to enable event tagging for specific input channels. It has a chatter control flag for each channel to indicate that an input channel has changed state too many times in a period of time or is changing state at too fast a rate.

The module checks each channel every 125 microseconds. If the channel event tagging mask bit is zero, that channel is not checked. Time synchronization is accomplished by the Ovation Controller writing a time reference simultaneously to all Sequence of Events modules with a 1 millisecond resolution.

The 5X00238G13 module provides two options for handling input chatter. The first option will set the chatter control flag if the rate of change for an input is greater than 1 per 100 milliseconds. The second option sets the chatter control flag if 4 or more state changes occur on an input between reads of the event buffer.

In summary, the Emerson Ovation 5X00238G13 is a robust and reliable module in the Ovation DCS, designed to monitor and control digital inputs in the field with high precision and speed.