IEC 60870-5-104 devices¶
Together with IEC104 specific events, generic enable and running events are also supported.
Supported data types (<data_type>):
‘single’
‘double’
‘step_position’
‘bitstring’
‘normalized’
‘scaled’
‘floating’
‘binary_counter’
‘protection’
‘protection_start’
‘protection_command’
‘status’
Supported command types (<command_type>):
‘single’
‘double’
‘regulating’
‘normalized’
‘scaled’
‘floating’
‘bitstring’
Master device¶
IEC104 master device configuration is specified by
hat-gateway://iec104.yaml#/$defs/master.
According to gateway specification, all IEC104 master device event types have prefix:
gateway/iec104_master/<device_name>/<source>/...
When IEC104 master device is enabled, connection establishment loop is started. Device will try to connect to one of configured remote slave devices in order defined by configuration. Once connection to remote slave is established, connection loop is temporary paused and new connection’s status is monitored. If connection is broken, connection loop is resumed. Changes in connection status are notified as gateway ‘status’ events.
Implementation of IEC104 master device is based on transparent mapping of IEC104 request/response messages to system/gateway events. Supported IEC104 messages:
Data response
When master receives IEC104 data response message, it will generate gateway ‘data’ event.
Command request
When master receives system ‘command’ event, it will send IEC104 command request message.
Command response
When master receives IEC104 command response message, it will generate gateway ‘command’ event.
Interrogate request
When master receives system ‘interrogate’ event, it will send IEC104 interrogate request message.
Interrogate response
When master receives IEC104 interrogate response message, it will generate gateway ‘interrogate’ event.
Counter interrogate request
When master receives system ‘counter_interrogate’ event, it will send IEC104 counter interrogate request message.
Counter interrogate response
When master receives IEC104 counter interrogate response message, it will generate gateway ‘counter_interrogate’ event.
In addition to bidirectional mapping of messages/events, IEC104 master device provides possibility of time synchronization. If configured, once connection to remote slave is established, master will periodically send IEC104 clock sync messages with current system time.
Gateway events¶
Events registered by gateway have event type starting with:
gateway/iec104_master/<device_name>/gateway/...
Available gateway events are:
…/status
Represents change in connection status. Upon enabling device, new
CONNECTINGstatus should be registered. Once device is disabled,DISCONNECTEDstatus should be assumed regardless of last registered status event (registration ofDISCONNECTEDstatus event during device disabling is mandatory but should not be relied upon).Source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/master/gateway/status.…/data/<data_type>/<asdu_address>/<io_address>
Represents received IEC104 data message.
Source timestamp is dependent on existence of IEC104 time. If IEC104 time is not available, source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/master/gateway/data.…/command/<command_type>/<asdu_address>/<io_address>
Represents received IEC104 command message.
Source timestamp is dependent on existence of IEC104 time. If IEC104 time is not available, source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/master/gateway/command.…/interrogation/<asdu_address>
Represents received IEC104 interrogation message.
Source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/master/gateway/interrogation.…/counter_interrogation/<asdu_address>
Represents received IEC104 counter interrogation message.
Source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/master/gateway/counter_interrogation.
System events¶
Events registered by other Hat components, which are consumed by gateway, have event type starting with:
gateway/iec104_master/<device_name>/system/...
Available system events are:
…/command/<command_type>/<asdu_address>/<io_address>
Represents request for command execution.
Source timestamp is dependent on existence of IEC104 time. If IEC104 time is not available, source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/master/system/command.…/interrogation/<asdu_address>
Represents request for interrogation (interrogation activation).
Source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/master/system/interrogation.…/counter_interrogation/<asdu_address>
Represents request for counter interrogation (interrogation activation).
Source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/master/system/counter_interrogation.
Slave device¶
IEC104 slave device configuration is specified by
hat-gateway://iec104.yaml#/$defs/slave.
According to gateway specification, all IEC104 slave device event types have prefix:
gateway/iec104_slave/<device_name>/<source>/...
IEC104 slave device provides implementation of IEC104 slave which accepts multiple parallel remote master connections. If configured, allowed master connections can be filtered based on remote master IP address. Change of active master connections list is trigger for registration of new gateway ‘connection’ event containing current list’s state.
IEC104 slave device is configured with list of available data. Once device is enabled, device will query last system ‘data’ events corresponding to configured data. This local cache is continuously updated with latest data states based on received system ‘data’ events. All remote masters are notified with IEC104 data messages each time locally cached data state is changed. When slave receives IEC104 interrogation or counter interrogation message, it will immediately respond with IEC104 interrogation/data messages based on current state of local data cache. Interrogation deactivation is not supported (slave responds with negative confirmation).
In addition to local cache of last data states, IEC104 slave device can be configured with arbitrary number of circular data buffers, each configured with limited size. Each data can be associated with single buffer. When system ‘data’ event, associated with configured data, is received, together with local cache update, data change is appended to the end of configured data buffer. Once buffer is full, new changes will overwrite oldest changes. Data change is removed from buffer when at least one remote master acknowledges delivery of IEC104 data message associated with data change (delivery confirmation is based on IEC104 APCI sequence numbers). When remote master connect to slave and new connection is established, slave will immediately send IEC104 data messages for each buffered data change. Slave’s initial query of system ‘data’ events is not buffered.
In addition to sending IEC104 data messages and processing IEC104 interrogation and counter interrogation requests, slave supports IEC104 command messages. Command messages are transparently bidirectionally mapped to ‘command’ events. Each time slave receives IEC104 command request, it will register new gateway ‘command’ event which contains unique identification of master connection which sent command request. When new system ‘command’ event is received, it must contain identification of master connection which will be used for sending associated IEC104 command response.
Gateway events¶
Events registered by gateway have event type starting with:
gateway/iec104_slave/<device_name>/gateway/...
Available gateway events are:
…/connections
Represents change in list of all active connections. When device is disabled, empty list of connections is assumed (when device is disabled, new connections event should be registered but user should not depend on this behaviour).
Source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/slave/gateway/connections.…/command/<command_type>/<asdu_address>/<io_address>
Represents received IEC104 command message.
Source timestamp is dependent on existence of IEC104 time. If IEC104 time is not available, source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/slave/gateway/command.
System events¶
Events registered by other Hat components, which are consumed by gateway, have event type starting with:
gateway/iec104_slave/<device_name>/system/...
Available system events are:
…/data/<data_type>/<asdu_address>/<io_address>
Represents data change.
Source timestamp is dependent on existence of IEC104 time. If IEC104 time is not available, source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/slave/system/data.…/command/<command_type>/<asdu_address>/<io_address>
Represents command response.
Source timestamp is dependent on existence of IEC104 time. If IEC104 time is not available, source timestamp is
None.Payload is specified by
hat-gateway://iec104.yaml#/$defs/events/slave/system/command.
Configurations and event payloads¶
$schema: "https://json-schema.org/draft/2020-12/schema"
$id: "hat-gateway://iec104.yaml"
$defs:
master:
type: object
required:
- remote_addresses
- response_timeout
- supervisory_timeout
- test_timeout
- send_window_size
- receive_window_size
- reconnect_delay
- time_sync_delay
- security
properties:
remote_addresses:
type: array
items:
type: object
required:
- host
- port
properties:
host:
type: string
port:
type: integer
response_timeout:
type: number
supervisory_timeout:
type: number
test_timeout:
type: number
send_window_size:
type: integer
receive_window_size:
type: integer
reconnect_delay:
type: number
time_sync_delay:
type:
- "null"
- number
security:
oneOf:
- type: "null"
- $ref: "hat-gateway://iec104.yaml#/$defs/security"
slave:
type: object
required:
- local_host
- local_port
- remote_hosts
- max_connections
- response_timeout
- supervisory_timeout
- test_timeout
- send_window_size
- receive_window_size
- security
- buffers
- data
properties:
local_host:
type: string
local_port:
type: integer
remote_hosts:
type:
- array
- "null"
description: |
if null, all remote hosts are allowed
items:
type: string
max_connections:
type:
- "null"
- integer
response_timeout:
type: number
supervisory_timeout:
type: number
test_timeout:
type: number
send_window_size:
type: integer
receive_window_size:
type: integer
security:
oneOf:
- type: "null"
- $ref: "hat-gateway://iec104.yaml#/$defs/security"
buffers:
type: array
items:
type: object
required:
- name
- size
properties:
name:
type: string
size:
type: integer
data:
type: array
items:
type: object
required:
- data_type
- asdu_address
- io_address
- buffer
properties:
data_type:
enum:
- SINGLE
- DOUBLE
- STEP_POSITION
- BITSTRING
- NORMALIZED
- SCALED
- FLOATING
- BINARY_COUNTER
- PROTECTION
- PROTECTION_START
- PROTECTION_COMMAND
- STATUS
asdu_address:
type: integer
io_address:
type: integer
buffer:
type:
- "null"
- string
events:
master:
gateway:
status:
$ref: "hat-gateway://iec101.yaml#/$defs/events/master/gateway/status"
data:
$ref: "hat-gateway://iec101.yaml#/$defs/events/master/gateway/data"
command:
$ref: "hat-gateway://iec101.yaml#/$defs/events/master/gateway/command"
interrogation:
$ref: "hat-gateway://iec101.yaml#/$defs/events/master/gateway/interrogation"
counter_interrogation:
$ref: "hat-gateway://iec101.yaml#/$defs/events/master/gateway/counter_interrogation"
system:
command:
$ref: "hat-gateway://iec101.yaml#/$defs/events/master/system/command"
interrogation:
$ref: "hat-gateway://iec101.yaml#/$defs/events/master/system/interrogation"
counter_interrogation:
$ref: "hat-gateway://iec101.yaml#/$defs/events/master/system/counter_interrogation"
slave:
gateway:
connections:
$ref: "hat-gateway://iec104.yaml#/$defs/messages/connections"
command:
$ref: "hat-gateway://iec101.yaml#/$defs/events/slave/gateway/command"
system:
data:
$ref: "hat-gateway://iec101.yaml#/$defs/events/slave/system/data"
command:
$ref: "hat-gateway://iec101.yaml#/$defs/events/slave/system/command"
messages:
connections:
type: array
items:
type: object
required:
- connection_id
- local
- remote
properties:
connection_id:
type: integer
local:
type: object
required:
- host
- port
properties:
host:
type: string
port:
type: integer
remote:
type: object
required:
- host
- port
properties:
host:
type: string
port:
type: integer
security:
type: object
required:
- cert_path
- key_path
- verify_cert
- ca_path
properties:
cert_path:
type: string
key_path:
type:
- "null"
- string
verify_cert:
type: boolean
ca_path:
type:
- "null"
- string
strict_mode:
type: boolean
renegotiate_delay:
type:
- "null"
- number