IEC 60870-5-103
IEC 60870-5-103
The IEC 60870-5-103 protocol is a companion standard for the informative interface of protection equipment.Standard IEC 60870-5-103 was prepared by IEC technical committee 57 (Power system control and associated communications).It is a companion standard for the basic standards in series IEC 60870-5:
Standard IEC 60870-5-103 defines communication between protection equipment and devices of a control system (supervisor or RTU) in a substation.
Standard IEC 60870-5-103 defines a multipoint communication protocol via which information can be exchanged between a control system (supervisor or RTU) and one or more protection devices. The control system is the master and the protection devices are the slaves. Each slave is identified by a unique address between 1 and 254. Address 255 is reserved for broadcast frames.
IEC 60870-5-103 Master
Configuring datapoints
WCC Lite supports IEC 60870-5-103 Master protocol over serial link (according EIA RS-485). Its full functionality list can be found in a IEC 60870-5-103 PID Interoperability List.
To use IEC 60870-5-103 Master in WCC Lite, it has to configured via an Excel configuration. This configuration contains two Excel sheets where parameters have to be filled in - Devices and Signals.
Devices parameters table:
| Parameter | Type | Description | Mandetory |
| name | string |
User-friendly name for a device |
No |
| description | string |
Description of a device |
No |
| device_alias | string |
Alphanumeric string to identify a device |
Yes |
| enable | boolean |
Enabling/disabling of a device |
Yes |
| protocol | string | Must be set "IEC 60870-5-103 master" | Yes |
| device | string |
Communication port (PORT1 or PORT2) |
Yes |
| baudrate |
integer |
Communication speed, bauds/s |
Yes |
| databits |
integer |
Data bit count for communication |
Yes |
|
stopbits |
integer |
Stop bit count for communication |
Yes |
|
parity |
string |
Communication parity option (none/even/odd) |
Yes |
|
flowcontrol |
string |
Communication device’s flow control option. Available options (case insensitive) - ”no” or ”none”, ”sw” or ”software”, ”hw” or ”hardware”. |
No |
|
link address |
integer |
Address of device (link) |
Yes |
|
asdu_address |
integer |
Application Service Data Unit adress |
Yes |
|
time_sync_interval_sec |
integer |
Time frame between Time Synchronization requests in seconds |
Yes |
|
gi_interval_sec |
integer |
Time frame between General Interrogation requests in seconds |
Yes |
|
poll_interval_ms |
integer |
Polling interval in milliseconds. Time frame between two telegrams from master. Default - 100 |
No |
|
event_history_size |
integer |
Maximum count of events in event log. Default - 0 |
No |
|
poll_timeout_ms |
integer |
Timeout of waiting for incoming request |
No |
|
serial_delay |
integer |
Communication device’s serial delay in milliseconds. Time frame in which master station is not TX’ing after last RX byte. Default: 50 |
No |
|
poll_retry_count |
integer |
Number of retries of failed requests before announcing that device is in Error state |
No |
Signals parameters table:
| Parameter | Type | Description | Mandetory |
|
signal_name |
string |
User-friendly name of a signal |
No |
|
device_alias |
string |
Device alias from a Devices tab |
Yes |
|
signal_alias |
string |
Unique signal name to be used |
Yes |
|
source_device_alias |
string |
device_alias of a source device |
For commands |
|
source_signal_alias |
string |
signal_alias of a source signal |
For commands |
|
enable |
boolean |
Enabling/disabling of a signal |
|
|
log_size |
integer |
Space for signal in event log |
|
|
gi |
boolean |
Including/excluding signal from General Interrogation. Default - 0 (exclude) |
|
|
common_address |
integer |
Address of a device |
|
|
function |
integer |
Function number |
|
|
info_address |
integer |
Information address |
|
|
info_number |
integer |
Information number |
|
|
data_type |
integer |
ASDU type identificator |
|
|
fleeting |
boolean |
Mark signal as fleeting type. Fleeting signals |
|
|
normalise_time_ms |
integer |
Time in milliseconds between station receiving DPI::ON and automatically switching to DPI::OFF. Default - 100. |
If fleeting is used |
IEC 60870-5-103 has an additional signal which can be configured to show communication status. It is used to indicate if the slave device has disconnected from master (WCC Lite). To configure such signal, two columns should be filled with particular values. To a newly created additional signal one should make job_todo equal to device_status and tag_job_todo equal to communication_status.
Debugging a IEC 60870-5-103 Master aplication
If configuration for IEC 60870-5-103 devices is set up, the handler for the protocol will start automatically. If a configuration is missing or contains errors, the protocol will not start. It is done intentionally to decrease unnecessary memory usage.
If IEC 60870-5-103 does not work properly (e.g. no communication between devices, data is corrupted, etc.), a user can launch a debug session from command-line interface and find out why link is not functioning properly or use WCC Utility to do that.
To launch a debugging session, a user should stop the iec103-master process and run the iec103-master command with respective flags. There is two posibilities to run debugging mode:
- use WCC Utility tab Debug (introduced in version v.1.3 with WCCOS firmware version v1.5.0);
- use console to run command inside the device;
bellow described parameters for debugging is accesbile over console (SSH).
iec103-master parameters:-h [--help] Display help information
-V [--version] Show package version
-d< debug level > Set debugugging level
-c [--config] Config path
-r [--raw] Show raw telegram data
-f [--frame] Show frame data
-R [--readyfile] Ready notification file
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