ABB FOUNDATION ™ Fieldbus Link Device LD 810HSE Ex V1.0

ABB FOUNDATION ™  Fieldbus Link Device LD 810HSE Ex V1.0

Equipment positioning and core attributes

Product type: LD 810HSE Ex is a foundation launched by ABB ™  The Fieldbus (Foundation Fieldbus) connection device is registered as a 42c class device according to the HSE protocol specification. Its core function is to serve as a gateway between the FF-HSE (Foundation High Speed Ethernet) subnet and the FF-H1 link, enabling data exchange and management between different bus networks.

Physical and power characteristics: Protection level is IP20, supporting DIN rail installation; Powered by 24V DC, compatible with Ethernet transmission rates of 10 Mbit/s or 100 Mbit/s, and supports device redundancy configuration to enhance operational reliability in industrial scenarios.

Core functions

（1） Gateway core capability

LD 810HSE Ex serves as a gateway, responsible for key data exchange and device management between the FF-HSE subnet and the FF-H1 link. Its specific functions are as follows:

H1 Device Management: Automatically identify all devices connected to the H1 link and configure these H1 devices through the HSE network using System Management and Network Management functions; Simultaneously supporting the access of H1 device function blocks through HSE, enabling remote control and parameter reading of on-site devices.

Data forwarding and synchronization: supports process data forwarding between H1 links, as well as bidirectional process data forwarding between H1 and HSE subnets, ensuring real-time data interoperability at different network levels; As an SM Time Publisher, it distributes system time to H1 devices and provides a unified time reference for alarm timestamps.

Alarm and Event Distribution: Collect alarm and event information sent by H1 devices and distribute it to relevant devices (such as connectivity servers) in the HSE subnet, integrating it into the overall system's alarm management system.

（2） HSE side functional module

Management Agent: Integrate System Management Agent and Network Management Agent to achieve standardized management of HSE subnets and associated H1 links.

Data exchange: Built in FMS server (Fieldbus Message Specification Server) provides object access services for H1 devices; Support the publishing/subscribing mechanism for H1 device process data to meet the real-time data transmission needs in industrial scenarios.

Time synchronization and maintenance: As an SNTP server (Simple Network Time Protocol Server) that complies with HSE standards, it achieves time synchronization within the HSE network; Provide maintenance functionality through a built-in web server, supporting firmware updates for linked devices and H1 power modules via HTTP or HTTPS protocols.

Function limitation: does not support Simple Network Management Protocol (SNMP); There is a clear resource limit on the HSE side, with specific parameters as shown in the table below:

HSE resource type upper limit value

64 HSE sessions have been configured

400 HSE virtual communication relationships (VCRs) have been configured

Automatic HSE session count 32

128 automatic HSE virtual communication relationships (VCRs)

H1-H1 data forwarding count 64

（3） H1 Link Side Function Module

Management and Data Interaction: Integrate System Management Manager and Network Management Manager to lead the management logic of H1 link; As an FMS client, it implements object access while supporting the publication and subscription of process data, as well as the reception and reporting of alarms and events.

Link Control: Serve as the Link Master in each H1 link, responsible for communication scheduling and resource allocation of the link; Support access to the Management Information Base (MIB) of H1 port from H1 network, but restrict write operations from H1 network to ensure network security.

Resource limit (single H1 channel): There are clear restrictions on the resource configuration of each H1 channel, with specific parameters as shown in the table below (note: the total number of VCRs of source/sink, client/server, and publisher/subscriber types in a single H1 channel must not exceed the "total connections" limit):

H1 channel resource type upper limit value

Total number of connections (VCRs) * 128

Number of overnight connections (alarm reception) 10

Number of client server connections: 39+1

Publisher+subscriber connections 100

LAS scheduling table quantity 2

Number of sub scheduling tables 4

The number of sequences in each sub schedule table is 64

The number of elements in each sequence is 4

LAS scheduling table field size (bytes) 2000

（4） H1 Live List

Record key information of all active H1 devices on the H1 chain, including node addresses, PD tags (Process Data Tags), and device IDs, to provide basic data support for device management and troubleshooting.

（5） Built in web server

Support access through a standard web browser (with JavaScript enabled) to query general information of linked devices (such as device status, configuration parameters, etc.), provided that the PC where the browser is located is connected to LD 810HSE Ex via Ethernet.

Installation and certification in hazardous environments