IEC 61850 / MMS

IEC 61850 describes a substation as a model: an IED (intelligent electronic device) holds logical devices, each with logical nodes such as MMXU (measurements) or XCBR (circuit breaker), which hold data objects and data attributes grouped by functional constraint (MX, ST, CO, CF and so on). On the wire, client/server communication is mapped onto MMS (Manufacturing Message Specification). Devices and their configuration are described in SCL files (.icd, .cid, .scd).

Where you meet it

• Protection relays, bay controllers and merging units in substations
• Battery storage, solar and wind plants connected at medium and high voltage
• Gateways between station buses and SCADA

Quickstart

From the command line

Download iec61850ctl from GitHub Releases, or go install github.com/otfabric/iec61850ctl@latest, then:

# List logical devices
iec61850ctl list lds --host 192.0.2.10

# Read a measurement (FC MX)
iec61850ctl get object --host 192.0.2.10 \
  --object MNSREF615LD0/FMMXU1.Hz.mag.f --fc MX

# Subscribe to a buffered report (Ctrl+C to stop)
iec61850ctl subscribe report --host 192.0.2.10 \
  --ld MNSREF615LD0 --ln LLN0 --report rcbMeasFlt01 --type BR \
  --show-values --interrogation

# Parse SCL offline
iec61850ctl scl parse --input device.cid --flatten

# Run a local MMS server from SCL
iec61850ctl server start --scl device.cid --host 0.0.0.0 --port 102

From Go

go get github.com/otfabric/go-iec61850

List logical devices and read one attribute by its IEC 61850 reference:

package main

import (
  "context"
  "fmt"
  "log"

  "github.com/otfabric/go-iec61850"
)

func main() {
  ctx := context.Background()

  client, err := iec61850.Dial(ctx, "10.0.0.1:102", iec61850.DialOptions{})
  if err != nil {
    log.Fatal(err)
  }
  defer client.Close(ctx)

  devices, err := client.ListLogicalDevices(ctx)
  if err != nil {
    log.Fatal(err)
  }
  for _, ld := range devices {
    fmt.Println(ld.Name)
  }

  ref, _ := iec61850.ParseRef("PROT1LD/MMXU1.TotW.mag.f[MX]")
  val, err := client.Read(ctx, ref)
  if err != nil {
    log.Fatal(err)
  }
  fmt.Println(val)
}

What the libraries support

Interoperability

mms-interop publishes adapter images for libiec61850 and IEC61850bean. The MMS and IEC 61850 interop tests live in go-mms and go-iec61850 and run against those images.