Emerson Process Management IM-106-340 OFF-LINE and ON-LINE Operations Logic I/O Configurations

Oxymitter 4000

Instruction Manual

IM-106-340, Rev. 4.0 May 2006

OFF-LINE AND ON-LINE OPERATIONS

LOGIC I/O CONFIGURATIONS

The HART Communicator can be operated both off-line and on-line.

Off-line operations are those in which the communicator 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.

In the on-line mode, the communicator is connected 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 warm-up period ends to continue.

The opening menu displayed on the LCD is different for on-line and off-line operations. When powering up a disconnected (off-line) communicator, 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.

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 8-1.

HART/AMS MENU TREE

Table 7-1. Logic I/O Configuration (as set at HART/AMS or LOI)

This section consists of a menu tree for the HART Communicator. This menu is specific to Oxymitter 4000 applications.

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 O2.
3	The unit is configured for both a Unit Alarm and Low O2.
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
	Impedance/CALIBRATION RECOMMENDED.

6The unit is configured for both a Low O2 and High AC Impedance/CALIBRATION

RECOMMENDED.

7The unit is configured for a Unit Alarm, a Low O2, and a High AC Impedance/CALIBRATION RECOMMENDED.

8**	The unit is configured for a calibration handshake with IMPS 4000 or SPS 4001B.
	CALIBRATION RECOMMENDED will initiate the calibration cycle.

9The unit is configured for a calibration handshake. CALIBRATION RECOMMENDED will not initiate the calibration cycle with the IMPS 4000 or SPS 4001B.

*The default condition for an Oxymitter 4000 without an IMPS 4000 or SPS 4001B. **The default condition for an Oxymitter 4000 with an IMPS 4000 or SPS 4001B.

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