SIREC D Display Recorder 7ND4000

Programming
4.6.14 Alarms. A total of five alarms can be
set for each point programmed. These alarms can
be any mixture of the following alarm types:
• 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.)
In the case of Linear Dry Contact Inputs the choice
is
• None no alarm set
• Open set Alarm on open contact
• Close set Alarm on closed contact
• Abnormal set alarms for abnormal conditions
(TCBO, Overflow, invalid etc.)
In the case of Conditional Inputs the choice is
• None no alarm set
• True set Alarm if condition is true as
defined
• False set Alarm if condition is false as
defined
• Abnormal set alarms for abnormal conditions
(TCBO, Overflow, invalid etc.)
4-42
NOTE
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.
Alarms programming also allows you to program an
Alarm Deadband and Alarm Delay for each alarm
set. The Alarm Deadband is the hysteresis.
A. Programming Parameters - Alarms
programming requires setting parameters for:
• Alarm Limits
• Alarm Deadband
• Alarm Delay
B. Alarm Limits - Five alarms can be set for
each point programmed. These five alarms can be
any combination of Alarm Types except Open,
Closed, True, and False, for any input other than
Linear Dry Contact or Conditional point types. Open
and Closed and Abnormal Alarm Types are used for
Linear - Dry Contacts, and True, False and
abnormal Alarm Types are used for Conditional
Point Types. Actual Alarm values are entered in the
same Engineering Units that the point is
programmed as.
1. Programming from "Alarms" prompt - At the
"Alarms" prompt in the Point Setup Menu, press
ENTER. The display will show a menu item in the
Alarms Setup Menu.
2. Use the UP (↑) or DOWN (↓) Arrow Keys to
scroll through the menu items and highlight "alm
limits" appears. Press ENTER and the display
reads "alarm # X".
3. Use the UP (↑) or DOWN (↓) Arrow Keys to
select the desired Alarm Number (1 through 5)
and press ENTER. The display will show the
alarm type menu with the current setting highlighted
as in Figure 4-14.
Type=none
Type=high
Type=low
Type=rate
Type=abnorm
Type=open
Type=close
Type=true
Type=false
Figure 4-14 Alarm
Type Menu
a. Type = None - Selecting
“Type=none” will disable
the alarm function.
Use the UP (↑) or DOWN
(↓) Arrow Keys to scroll
through the Alarm Types
and highlight "Type=
none". Press ENTER to
accept the EXIT to return
to the "alm limits" prompt
in the Alarms Setup Menu
Programming
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 (↓)
Arrow Keys to scroll through the Alarm Types
and highlight "Type=high". Press ENTER and
the display reads "high�XX...XX�". Use the
numeric keypad to enter the High Alarm Value.
Press ENTER and the display reads "contact #?
X". This is the contact output that will respond to
Siemens AG C79000-G7374-C211-01
SIREC D Manual