Micromod MOD: 30ML Display Script Guide - Manual (Page 18)

MOD 30ML Display Guide
Display Basics
2 -12
2.3.5 Process Alarm Display Blocks
The Process Alarm Display (PAD) block combines the functions of detecting and
signaling alarms, and displaying them on the front face of the MOD 30ML. It is NOT
necessary to construct separate display blocks for alarms, unless the user desires custom
alarm displays.
Separate PAD blocks are used for each alarm trippoint desired. For example, a high
process alarm, a low process alarm and a deviation alarm would require three PAD
blocks.
Figure 2 .7.
Process Alarm
Display Block
The general menu for the Process Alarm Display block is shown in the figure above. The
Alarm Input is the value being examined for the alarm condition. Typically this would be
PVI from the PID block, or the Result of an input function block. However with MOD
30ML the user is not restricted to alarming only on process; this input can be any variable,
such as Controller Output value, or a discrete parameter. Therefore the user may select a
data type other than floating point. The next figure shows sample block connections for
Process Alarm Displays.
Figure 2 .8.
Process Alarm
Display Block
Connections