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

MAN-0076 Rev 05 Millennium II

December 07, 2012

Net Safety Monitoring Inc

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Emerson M21, M22 user manual Hart Communication, Bit Meaning

M22, M21 specifications

The Emerson M21 and M22 are advanced industrial controllers designed to enhance process automation and operational efficiency in various industries. Emerson, a leader in automation technology, introduced these models to meet the growing demands for precision, reliability, and connectivity in today’s fast-paced industrial environments.

One of the standout features of the M21 and M22 controllers is their robust processing power. They are equipped with high-speed processors that enable rapid data processing and real-time decision-making. This capability allows users to respond promptly to changing process conditions, ensuring optimal performance and minimizing downtime.

The M21 and M22 offer versatile connectivity options, supporting various communication protocols such as Ethernet, Modbus, and TCP/IP. This extensive connectivity facilitates seamless integration into existing systems, allowing for easy collaboration between devices across different platforms. Users can monitor and control processes from virtually anywhere, providing flexibility and convenience.

Scalability is another essential characteristic of the M21 and M22. These controllers can easily adapt to growing operational demands, enabling businesses to expand their automation solutions without the need for complete overhauls. Whether you're running a small system or a large, complex operation, these controllers can scale to meet your needs.

Furthermore, Emerson has incorporated advanced diagnostic and predictive maintenance features into the M21 and M22 models. These technologies leverage data analytics to predict potential failures before they occur, allowing users to take proactive measures. This not only minimizes unexpected downtime but also extends the lifespan of equipment, contributing to overall cost savings.

In terms of user interface, the M21 and M22 come with intuitive software that provides easy navigation and configuration. The interface is designed to be user-friendly, reducing the learning curve for new operators and allowing for efficient setup and management of processes.

Finally, both controllers are built with a focus on reliability and durability, making them suitable for various industrial environments, including harsh or demanding settings. Their robust design ensures consistent performance, even in challenging conditions.

In summary, the Emerson M21 and M22 controllers represent cutting-edge solutions in industrial automation, offering high processing power, flexible connectivity, scalability, advanced maintenance features, user-friendly interfaces, and robust design. Companies looking to enhance their automation capabilities will find these controllers to be valuable assets in achieving operational excellence.