Omega RD8800 User Manual page 77

Chapter 5 Programming
5.6.5.10.1 Alarm limits (types)
For all inputs other than Linear Dry Contact or Conditional, the Alarm types are:None, High, Low, Rate,
or Abnormal. For Linear Dry Contacts the Alarm types are: None, Open, Close or Abnormal. For
Conditional Inputs, the Alarm types are: None, True, False or Abnormal. The Alarm types are described
below:
None No alarm set
High Set High alarms (up to five). Alarm will occur if input is greater than the Alarm set point.
Low Set Low alarms (up to five). Alarm will occurs if input is less than the Alarm set point.
Rate Set Rate alarms (up to five). Alarm will occur if the input changes by more than the set
point value in the specified time.
Abnormal Set alarms for Abnormal conditions (TCBO, Overflow, invalid etc.)
Open Set alarm on Open contact (Linear Dry Contact inputs ONLY)
Close Set alarm on Closed contact (Linear Dry Contact inputs ONLY)
True Set alarm if condition is True as defined (Conditional inputs ONLY)
False Set alarm if condition is False as defined (Conditional inputs ONLY)
If you try to program an alarm with an illegal condition, for example, setting a Linear Voltage input
alarm to "Type=close", you will get an ILLOGICAL error.
To set an Alarm limit (type):
From the Point Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Alm
limits and press the ENTER button. You will be prompted with "alarm #? X". Use
the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to select which Alarm number (1 through 5) you
want to set and then press the ENTER button. The Alarm Type menu will be
displayed as shown in Figure 5-7 with the current setting highlighted. Note that
the Alarm Type menu displays all Alarm types, but not all types are valid for all
Point Types.
a. Type=None
If the Alarm type is set to none, the alarm function will be disabled. Use the
UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Type=none and press the ENTER
button. Press the EXIT button to return to the Alarm Setup menu.
b. High Alarm Type
High Alarms become active when the input exceeds (is greater than) the set point.
To set the Alarm Type as High:
Use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Type=high and press the ENTER button. You will
be prompted with "high
press the ENTER button. You will be prompted with "contact #? X". This is the contact output that
will respond to this alarm provided the relay option is fitted. If no contact output is required, select
contact # 0. Use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to select the desired contact number (0 to 6) and
press the ENTER button. The display will return to the Alarm Type menu. Press the EXIT button
to return to the Alarms Setup menu.
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XX.XX ". Use the numeric keypad to enter the High Alarm value and
Page 5-15
Type=none
Type=high
Type=low
Type=rate
Type=abnorm
Type=open
Type=close
Type=true
Type=false
Figure 5-7
Alarm Type
Menu