(pre change) value : this prompts the operator to re-enter the required new value. It is important that the Parameter is re-entered, to ensure that the Working register memory in both the Psion and the MSM400 contain the same data.

If either of the above two Outgoing or Reply Comms Error messages occurs in a Backup menu transfer between registers, it is advisable to repeat the Backup operation to complete the data transfer, or check that the memory has been transferred correctly.

The message “NO RESPONSE FROM TRANSMITTER” Indicates a failure of the power on the loop or a failure of the connection of the SMART interface across the loop or the address of the instrument has been changed. Connection should be re-established if possible.

The message “LOCKED OUT BY BUS ACTIVITY” indicates there are either two secondary masters on the bus or a primary master is continuously trying to access an instrument that does not exist.

The message “INCOMPLETE REPLY” indicates that a start of a message was detected but the message was not completed in the time allowed. This is most likely to be due to a power failure or a loss of connection.

D.11.0Current Loop Checks and Trimming

Introduction

The MSM400 4-20mA control unit has no customer or service engineering adjustable potentiometers on the printed circuit boards. All current trimming of the 4mA and 20mA set points is achieved via the SMART communicator. Because this is a “live” interaction, the access to this function is via the MONITOR functions and screen on the Communicator.

Select “Current – Output” and the screen displayed is

** CURRENT OUTPUT ** Set current Trim-maximum Trim-maximum

These three functions are as follows:

D.11.1Set current

This selection is used for MSM400 transmitters attached to a single 4-20mA loop to check for correct functioning of all the equipment – the MSM400, the communications and the other loop indicators and outputs.

By selecting the “Set-current” option the screen prompts the operator to choose a current value for the loop, for example 12mA.

ENTER NEW VALUE

12-

On pressing “EXE”, the current in the loop is set to this value, and the loop indicators and trips can be checked for function and calibration. The LCD screen changes to suggest selection of a new value if necessary. To abort the procedure press ON/CLEAR

CURRENT OUTPUT = 12 mA

ENTER NEW VALUE

-

Some specific error messages are used to prevent the loop current being set outside the valid 4-20mA

limits.

IP258

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Emerson IP258 manual Current Output ** Set current Trim-maximum Trim-maximum, 11.0Current Loop Checks and Trimming
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IP258 specifications

The Emerson IP258 is an advanced industrial monitoring device designed to enhance operational efficiency and ensure optimal performance in various industrial applications. It is particularly suited for monitoring, controlling, and managing processes across diverse industries such as oil and gas, pharmaceuticals, food and beverage, and water treatment.

One of the main features of the IP258 is its robust and flexible architecture, enabling seamless integration with a wide range of field devices, sensors, and control systems. This adaptability ensures that the device can be tailored to specific operational needs, thus streamlining processes and enhancing reliability. Its modular design allows for easy upgrades and expansions, making it a cost-effective solution for companies looking to future-proof their investments.

The IP258 boasts advanced communication technologies, including support for various industrial protocols such as Modbus, Ethernet/IP, and Profibus. This versatile communication capability facilitates real-time data sharing and interoperability between different systems, promoting a cohesive operational environment. The device is equipped with multiple input and output options, which further enhances its functionality and connectivity with existing infrastructure.

Another standout characteristic of the Emerson IP258 is its user-friendly interface, which simplifies operation and minimizes training requirements. The intuitive graphical interface allows operators to easily visualize system performance, access historical data, and quickly identify anomalies. This ease of use not only ensures efficiency during normal operations but also aids in rapid troubleshooting and issue resolution.

The device is designed with high reliability and durability in mind, featuring superior environmental resistance to withstand harsh industrial conditions. Its rugged housing and advanced components ensure long-term performance, reducing the likelihood of unexpected downtime and maintenance costs.

In addition, the IP258 incorporates built-in data logging and analytics capabilities, enabling users to gather insights into operational trends and performance metrics. This feature is essential for predictive maintenance and proactive decision-making, ultimately driving productivity and minimizing operational risks.

Security is another priority in the design of the Emerson IP258. The device includes a comprehensive suite of cybersecurity measures to protect sensitive data and prevent unauthorized access, ensuring that operational integrity is maintained at all times.

Overall, the Emerson IP258 stands out as a powerful and versatile tool for industrial monitoring and control, combining advanced features, robust technology, and user-friendly design to meet the demands of modern industrial environments.
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