DSM250 User’s Manual

8.3.4 Trigger Source

This allows the selection of the parameter to be monitored. The parameters are laid out as per section 4.2. The trigger source is specified in three parts, which when combined will uniquely identify a single parameter on the bus.

8.3.4.1 Type

The Type corresponds to the category of data.

The desired option is selected using the Scroll Up and Scroll Down buttons.

8.3.4.2 Data

The Data corresponds to the Data Type of data.

The desired option is selected using the Scroll Up and Scroll Down buttons.

8.3.4.3 Instance

The Instance corresponds to the instance of the data type on the bus.

The desired option is selected using the Scroll Up and Scroll Down buttons.

8.3.5 Description

This is a textual field that will be displayed on the DSM250 and transmitted to Alert Slave devices. It is intended to describe the alert (e.g. Fire).

8.3.6 Location

This is a textual field that will be displayed on the DSM250 and transmitted to Alert Slave devices. It is intended to describe the location at which the problem was detected (e.g. Main Stateroom).

8.3.7 Trigger Configuration

This set of fields is used to describe the condition under which the alert will be triggered. The sub- fields will vary depending on the Trigger Type, which, in turn, is determined by the Trigger Source.

8.3.7.1 Trigger Type is High Alert

A high alert is used to signal you when a parameter value rises above a threshold you determine. For example, you can set an alert to occur whenever the freezer temperature rises above 0°C.

8.3.7.1.1 Description

A high alert and associated diagram are shown in the figure below.

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Maretron DSM250-01 user manual Trigger Source, Description, Location, Trigger Configuration