Required Transmitter Configuration

4.5.1Configuring the primary variable

The primary variable is the process variable to be reported through the mA output. Table 4-7 lists the process variables that can be assigned to the mA outputs.

Table 4-7mA output process variable assignments

Process variable

ProLink II label

 

 

Mass flow

Mass Flow Rate

 

 

Volume flow

Volume Flow Rate

 

 

Note: The process variable assigned to the mA output is always the PV (primary variable).

4.5.2Configuring the mA output range (LRV and URV)

The mA output uses a range of 4 to 20 mA to represent the assigned process variable. You must specify:

•The lower range value (LRV) – the value of the process variable that will be indicated when the mA output produces 4 mA

•The upper range value (URV) – the value of the process variable that will be indicated when the mA output produces 20 mA

Enter values in the measurement units that are configured for the assigned process variable (see Section 4.4).

Note: The URV can be set below the LRV; for example, the URV can be set to 0 and the LRV can be set to 100.

4.5.3Configuring the AO cutoff

The AO (analog output) cutoff specifies the lowest mass flow or volume flow value that will be reported through the mA output. Any mass flow or volume flow values below the AO cutoff will be reported as zero.

Note: For most applications, the default AO cutoff is used. Contact Micro Motion customer support before changing the AO cutoff.

Multiple cutoffs

Cutoffs can also be configured for the mass flow and volume flow process variables (see Section 6.5). If mass flow or volume flow has been assigned to the mA output, a non-zero value is configured for the flow cutoff, and the AO cutoff is also configured, the cutoff occurs at the highest setting, as shown in the following example.

Example

Configuration:

 

• mA output: Mass flow

 

• AO cutoff: 10 g/sec

 

• Mass flow cutoff: 15 g/sec

 

As a result, if the mass flow rate drops below 15 g/sec, the mA output

 

will report zero flow.

 

 

24

Micro Motion® Model 1500 Transmitters with the Filling and Dosing Application

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Emerson Process Management 1500 manual Configuring the primary variable, 7mA output process variable assignments, Example
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1500 specifications

Emerson Process Management 1500 is a cutting-edge distributed control system designed to enhance operational efficiency, safety, and reliability in industrial processes. Renowned for its robust architecture and scalable features, the 1500 system caters to various sectors, including oil and gas, pharmaceuticals, chemicals, and utilities.

One of the standout features of the Emerson 1500 is its modular design, allowing users to customize and scale the system according to their specific needs. This flexibility ensures that operations can grow and adapt without requiring a complete system overhaul. The control system supports a range of I/O modules, enabling integration with various field devices and technologies.

The Emerson 1500 employs advanced control algorithms to optimize process performance. This includes model predictive control (MPC) and multivariable control, which enhance the ability to manage complex processes through predictive analytics. This predictive capability not only improves operational efficiency but also reduces downtime and maintenance costs.

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Security is a critical concern for modern industrial control systems, and the Emerson 1500 addresses this with a multi-layered security framework. This includes secure communications, robust authentication, and access controls, ensuring that only authorized personnel can interact with the system.

The Emerson Process Management 1500 also emphasizes interoperability, supporting various communication protocols such as Ethernet/IP, Modbus, and HART, facilitating seamless integration with existing infrastructure. This capability is particularly advantageous for organizations looking to modernize their systems without entirely replacing legacy equipment.

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In summary, the Emerson Process Management 1500 is a versatile and advanced distributed control system characterized by modularity, advanced control features, user-friendliness, robust security, interoperability, and data analytics capabilities. Its comprehensive approach ensures that industries can not only meet current operational demands but also prepare for future challenges in an ever-evolving landscape.
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