MCTB
55
When the alarm indication is set for
Hide alarm status/settings
, the alarm will be removed from the MCTB
runtime application. The user will not be able to edit the alarm message or adjust the alarm set point. When
the alarm activates, there will be no indication or message on the alarm screen and the audible alarm will not
sound. The alarm operates as a “silent” alarm with no indication to the user.
When the alarm indication is set for
Show alarm status/settings
, the user will be able to access and change
the alarm set point and alarm message under the device settings. When the alarm occurs, the alarm message
will be displayed on the Alarm screen and the audible alarm will sound.
4.3.16 Alarm Setpoint
The alarm set point can be set when output 2 is configured as an alarm output. If the alarm indication is set to
“show” the alarm status and settings, the set point will also be available in the MCTB runtime application. If the
alarm indication is set for “hide” alarm status and settings, the alarm set point will not be available in the MCTB
runtime application and can only be changed in the Configurator.
4.3.17 Alarm Hysteresis
The alarm hysteresis can be set when output 2 is configured as an alarm output. It is used to eliminate rapid
on/off cycling of the alarm output by applying a safe-sided dead band to the alarm. When the alarm set point
is exceeded, the alarm will activate. The alarm will not deactivate until the process rises above (for low alarm)
or falls below (for high alarm) the alarm set point by the hysteresis value.
The hysteresis can be set from a minimum of 0.1 to a maximum of 10.0 for units of degrees Centigrade and to
a maximum of 18.0 for units of degrees Fahrenheit and linear input types.
4.3.18 Alarm Failure Transfer
The Alarm Failure Transfer is used to set the state of output 2 if there is an input failure, i.e., sensor break. The
selections are mutually exclusive, i.e., selecting one will turn off the other. Once the desired alarm failure
transfer selection has been made, press the “Done” button to return to the main Limit Configuration screen.
Содержание MCTB 4.3
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