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MAN-0076 Rev 05 Millennium II
December 07, 2012
Net Safety Monitoring Inc
Table 8: Transmitter Status Register value and meaning
Bit
Meaning
0x0000
Normal Sensor operation – no fault or alarm has happened
0x0001
Channel 1 sensor fault status tripped. Communication Fault, Calibration Fault, etc
0x0002
Channel 1 Low Alarm tripped
0x0004
Channel 1 High Alarm tripped
0x0008
Channel 2 sensor fault status tripped. Communication Fault, Calibration Fault, etc
0x0010
Channel 2 Low Alarm tripped
0x0020
Channel 2 High Alarm tripped
0x0040
Channel 1 needs Calibration
0x0080
Channel 2 needs Calibration
5.5 HART Communication
The HART protocol is a powerful communication technology enabling users to exploit the full functionality of the
Millennium II Transmitter. The HART communication option is only available with the single channel version of
the Millennium II Transmitter. The Millennium II Transmitter is a generic device that will work with other universal
communication devices.
The HART Communicator may be connected to the single channel Analog/HART model Millennium II Transmitter
via the HART Port connector (HPT-001) which provides the necessary interface for communication. The HART Port
connector is fitted to one of the ¾” NPT conduit entries and its communication wires fitted to the HART Pins located
at J5 near the ribbon cable on the underside of the display/CPU assembly. The HART Communicator probe wires
(leads) are then connected to HART Port connector contact points. HART Communication may also be done remotely
using a designated Net Safety Multipurpose Junction box (JB-MPH-A/S). See the HART Port connector manual
(MAN-0083) for more details. When remote HART Communication is being done, ensure the HART jumper is
connected across pins at J5 near ribbon cable on display/CPU assembly. By default the jumper is connected across
pins. The HART Communicator can be connected directly in the 4-20mA signal wiring across a 250 - 600 Ohm
resistor. Do not install resistor within transmitter. See Figure 20.
Figure 20: Analog/HART wiring