MTL4850 Gateway Integration Manual

Interpretation of Alarm Event Log

The MTL4850 multiplexer maintains an alarm event log that can be read through the instrument management software. Event types can be classified into the following categories:

General information category:

Alarm generated by HART test command 242: MTL diagnostic test activated

No transmitter storage space: The on-site device data memory is full

Discovering HART transmitters before Rev 5: Contact the manufacturer for updated information

Detected other main stations on the circuit: there is an auxiliary main station present

Value class events that need attention:

Duplicate transmitter unique ID: This ID has already been used on the circuit, contact the manufacturer

+12V power supply out of range: Check the power specifications of the multiplexer

-12V, VBias, VLeak are out of range: usually need to return to MTL for processing

Error causing module reset:

This type of error includes CRC error, watchdog reset, clock monitor reset, memory test failure, etc. Single or occasional occurrences of these events may be due to power noise or interruptions, but multiple or frequent events may indicate installation or module issues, in which case the module should be returned to MTL for inspection.

Compatible control system

MTL offers a range of customized backplates for installing MTL4500 series IS isolators to meet specific control or safety system requirements. Many customized boards for analog I/O signals include ribbon cable connectors for connecting HMP-HM64. Typical compatible systems include:

Emerson DeltaV and DeltaV SIS systems

HIMA HiMax

Honeywell Experion C300、 Safety Manager, Process Manager I/O System

Invensys Foxboro FBM system, Triconex Tricon, and Trident system

Siemens ET200M

Yokogawa Centum R3, Prosafe RS system

Software connectivity

The MTL4850 system supports instrument management software packages based on device description files or FDT technology. MTL provides software driver files to support both methods. MTL4850 Communication DTM (Device Type Manager) enables the MTL4850 system to transmit HART data to any instrument management software that adopts the FDT/DTM concept. DD and DTM files can be downloaded for free from the MTL website.