Modbus TCP/IP to IEC 61850 Dual Port Gateway

Description

Modbus TCP/IP to IEC 61850 Dual Port Gateway

The Modbus TCP/IP to IEC 61850 gateway enables communication between the Intelligent Electronic Devices (IEDs) on an IEC 61850 network and Programmable Logic Controllers (PLCs) or Programmable Automation Controllers (PACs) on a Modbus TCP/IP network.

The configuration utility software provided with the gateway uses IED configuration files to import complex IEC 61850 data structures. The utility creates Variable files and Function Block files for import into Unity Pro projects for Quantum or M340 processors.

IEC 61850 is the international standard that defines the hardware and communication requirements for all devices within substation automation. The standardized naming conventions imposed by the IEC 61850 standard improves interoperability between systems provided by diverse manufactures or created by multiple system integrators.

Architectures

Features and Benefits

Configuration Utility Integrates Tightly with Unity Pro	Application-specific Variable and Function Block files are automatically generated. Users are not required to develop communication logic or tag structures in their PLC or PAC projects.
Configuration Archive and Diagnostics	The gateway configuration file can be stored in an industrial SD card. This allows for rapid disaster recovery by moving the SD card from a failed gateway to a replacement gateway. Extensive diagnostics for the gateway and for both Modbus TCP/IP and IEC 61850 networks are available via the configuration utility.
Import Configured IED files	All IED data attributes are available for convenient mapping to Modbus registers.
Modbus TCP/IP Client/Server support	Enables multiple Modbus TCP/IP devices or SCADA devices to interface with IEC 61850 devices simultaneously.

Specifications

The gateway is enclosed in a sturdy extruded aluminum case with DIN-rail-mounting.

Hardware	Two (2) Ethernet ports for Modbus TCP/IP and IEC 61850 communication
Software	ProSoft 61850 Configuration Manager for configuration and diagnostic viewing ProSoft 61850 Tag Monitor for viewing live tag data ProSoft Discovery Service for setting a temporary IP address
Configuration Storage	Internally stored, by default. Configuration settings can be saved on an optional removable 1GB Industrial SD Card ProSoft 61850 Configuration Manager saves configuration information to an offline file.

Specifications – Modbus TCP/IP

The Modbus TCP/IP driver allows multiple independent, concurrent Ethernet connections. The connections may be Clients, servers, or a combination of both Clients and servers.

Modbus TCP/IP Client

• Actively reads data from and writes data to Modbus TCP/IP devices using MBAP messages on Service Port 502 or Encapsulated Modbus RTU messages on other Service Ports
• Supports up to 10 Client connections with a maximum of 2000 commands to talk to multiple servers
• Modbus Command optimization – Multiple tags can be combined into one Write command with up to 120 words

Modbus TCP/IP Server

• Accepts incoming connections on Service Port 502 from Clients using Modbus TCP/IP MBAP messages and on Service Port 2000 (or other Service Ports) from Clients using Encapsulated Modbus messages.
• Supports up to 20 independent, concurrent server connections for any combination of Service Port 502 MBAP messages and Encapsulated Modbus RTU messages on other Service Points

Modbus Commands Supported (Client and server)	3: Read Holding Registers 16: Preset (Write) Multiple Holding Registers
Configurable Parameters (Client and server)	Gateway IP Address PLC Read Start Register (%MW) PLC Write Start Register (%MW) Number of MBAP and MNET servers Gateway Modbus Read Start Address Gateway Modbus Write Start Address
Configurable Parameters (Client Only)	Minimum Command Delay Response Timeout Retry Count Command Error Pointer
Command List	Maximum 2000 Modbus Client commands (one IEC Data Attribute per command)
Status Data	Error codes reported individually for each command High-level status data available from Modbus TCP/IP Client through MNET server (for example PLC or PAC)
Command List Polling	Each command can be individually enabled or disabled; write-only-on-data-change is available

Specifications – IEC 61850 Client

• Supports up to 45 IEDs
• Send commands from the PLC or PAC to the IED using Control Types
  • Direct-with-Normal-Security
  • Select Before Operate (SBO)-with-Normal-Security
  • Direct-with-Enhanced Security
  • Select Before Operate (SBO)-with-Enhanced-Security

 

ACSI Basic Conformance
SCSMs supported	SCSM: IEC 61850 8.1(MMS) used
ACSI Model Conformance
Reporting	Buffered Report Control Block (BRCB) Unbuffered Report Control Block (URCB)
GOOSE	entryID, DataReflnc
Control	Direct-with-Normal-Security SBO-with-Normal-Security Direct-with-Enhanced-Security SBO-with-Enhanced-Security
Logical Nodes	IEC 61850 Logical Nodes, including Logical Nodes for Hydro Power Plants and Logical Nodes for Wind Power Plants
Configurable Parameters	MMS Command Delay
Status Data	Status available per node Report and GOOSE status available High-level status data available from Modbus TCP/IP Client through the MNET server (for example PLC or PAC)

Specifications – SNTP/NTP Client

The gateway supports a Simple Network Time Protocol (SNTP/NTP) client service that can synchronize the gateway’s time by periodic update requests to a Coordinated Universal Time (UTC) system. The user can configure the SNTP/NTP server details in ProSoft 61850 Configuration Manager. The resolution of the time is in milliseconds (ms).

Configurable Parameters

SNTP/NTP server synchronization rate (in minutes) SNTP/NTP server Address