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4.4.3.5 Alarm Relays (continued)
Description –
This is a text field for naming the device connected to the relay or it could
be the location where the device is installed. This field can take up to 16 alphanumeric
characters. This name will be displayed anywhere on the web pages associated with
alarm relays; for example the Readings applet.
Defaults are
Alarm Relay1
and
Alarm Relay2
.
Status –
The options are
Disable, Low, High,
and
Low or High
. The default is
Disable
.
If
Low
is selected Set Point Low must be given a value and once the sensor reading falls
below that value the relay will change status.
If
High
is selected Set Point High must be given a value and once the sensor reading
rises above that value the relay will change status.
If
Low or High
is selected Set Point Low and High must be given values and relay status
will change once the sensor reading is outside that range.
If
Disable
is selected relays will be deactivated.
Alarm status with the associated set point will be shown on the chart applet as well.
Type –
The options are
Unlatch
and
Latch
. The default is
Unlatch
.
If
Unlatch
is selected and the relay is activated, once the sensor reading goes back
within the Set Point range, the alarm will be deactivated automatically.
If
Latch
is selected, once the sensor reading goes back within the Set Point range, the
relay will remain active until the user clears it by clicking on the Clear Latch button.
Set Point High –
This is the field for the upper Set Point.
Set Point Low –
This is the field for the lower Set Point.
End Character –
This is the character (in Hex) that the iServer will send along with the
alarm status.
This applies to either Continuous or Command mode described on the Server page,
under the Configuration menu (
Section 4.4.3.2
).
The default is
0D
meaning a Carriage Return character will be sent after the value.
Display –
This would indicate whether to display the status of the alarm relays on the
Readings applet as well as the TCP Command and Continuous modes, and any other
related fields.
The default is
unchecked
.
Record all alarm events on the flash memory –
If checked, all the alarm events with
stamped date and time will be recorded on the flash memory card.
By pressing the Retrieve button the ASCII log file will be opened.
The default is
unchecked
.
Using the web server, the log file can be retrieved if the file size is 32 KB or
smaller. For a larger file size you must use a flash card reader to open the log
file. Refer to
Section 4.10
.