Rosemount Oxymitter 4000, Instruction Bulletin

Page: 109 / 127

IB-106-340
7-3
7-4. OFF-LINE AND ON-LINE OPERATIONS. The
HART Communicator can be operated both off-line
and on-line.
a. Off-line operations are those in which the commu-
nicator is not connected to the Oxymitter 4000.
Off-line operations can include interfacing the
HART Communicator with a PC (refer to
applicable HART documentation regarding
HART/PC applications.
b. In the on-line mode, the communicator is connec-
ted to the 4-20 mA analog output signal line. The
communicator is connected in parallel to the
Oxymitter 4000 or in parallel to the 250 ohm load
resistor.
NOTE
If the HART Communicator is turned on
while connected to the 4-20 mA analog
output signal line, an undefined status
indication appears while the communicator
warms up. Wait until the warmup period
ends to continue.
c. The opening menu displayed on the LCD is differ-
ent for on-line and off-line operations. When
powering up a disconnected (off-line) communi-
cator, the LCD will display the Main Menu. When
powering up a connected (on-line) communicator,
the LCD will display the On-line Menu. Refer to
the HART Communicator manual for detailed
menu information.
7-5. LOGIC I/O CONFIGURATIONS. The Oxymitter
4000 logic I/O output can be configured for ten
different modes through HART/AMS. The factory
default condition is Mode 5. A list of possible
configurations appear in Table 7-1.
The Unit Alarm configuration available for Modes 1, 3,
5, and 7 refers to the diagnostic alarm faults in Table
5-1.
7-6. MENU TREE FOR HART COMMUNICATOR/
OXYMITTER 4000 APPLICATIONS. This
section consists of a menu tree for the HART
Communicator. This menu is specific to Oxymitter
4000 applications.
Table 7-1. Logic I/O Configuration.
Mode Configuration
0 The unit is not configured for any alarm condition.
1 The unit is configured for a Unit Alarm.
2 The unit is configured for Low O
2
.
3 The unit is configured for both a Unit Alarm and Low O
2
.
4 The unit is configured for a High AC Impedance/CALIBRATION
RECOMMENDED.
5* The unit is configured for both a Unit Alarm and a High AC Imped-
ance/CALIBRATION RECOMMENDED.
6 The unit is configured for both a Low O
2
and High AC Imped-
ance/CALIBRATION RECOMMENDED.
7 The unit is configured for a Unit Alarm, a Low O
2
, and a High AC Imped-
ance/CALIBRATION RECOMMENDED.
8** The unit is configured for a calibration handshake with IMPS 4000 or SPS
4000. CALIBRATION RECOMMENDED will initiate the calibration cycle.
9 The unit is configured for a calibration handshake. CALIBRATION
RECOMMENDED will not initiate the calibration cycle with the IMPS 4000
or SPS 4000.
* The default condition for an Oxymitter 4000 without an IMPS 4000 or SPS 4000.
** The default condition for an Oxymitter 4000 with an IMPS 4000 or SPS 4000.