Reference Manual
00809-0100-4022, Rev AA
July 2002
Model 4600
3-12
Alarm and Saturation
Values for Multidrop
Mode
Transmitters set to multidrop mode handle saturation and alarm conditions
differently.
Alarm Conditions:
• Primary variable is sent with a status bit set
• Percent of range follows primary variable
• Temperature is sent with a status bit set
Saturation:
• Primary variable is sent normally
• Temperature is sent normally
Alarm Level Verification
To verify the transmitter alarm values, perform a loop test and set the
transmitter output to the alarm value (see Tables 3-1 and 3-2 on page 3-10,
and “Loop Test” on page 3-16). This feature is also useful in testing the
reaction of the control system to a transmitter in an alarm state.
Process Alerts
Process alerts allow the user to configure the transmitter to output a HART
message when the configured data point is exceeded. Process alerts can be
set for pressure, temperature, or both. A process alert will be transmitted
continuously if the pressure or temperature set points are exceeded and the
alert mode is
ON
. An alert will be displayed on a HART Communicator, or
AMS status screen. The alert will reset once the value returns within range.
NOTE
HI alert value must be higher than the LO alert value. Both alert values must
be within the pressure or temperature sensor limits.
HART Communicator
To configure the process alerts with a HART Communicator, perform the
following procedure:
1. From the
HOME
screen, follow the fast key sequence listed.
2. Select 3, “Config Press Alert” to configure the pressure alert.
Select 4, “Config Temp Alert” to configure the temperature alerts.
3. Use the right arrow key to configure the HI and LO alert values.
4. Use the left arrow to move back to the process alert menu.
Select 1, “Press Alert Mode” to turn on the pressure alert mode.
Select 2, “Temp Alert Mode” to turn on the temperature alert mode.
Fast Keys
1, 4, 3, 5
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