12.2 DNP 3.0 Master
Default group and variation sets are used to send commands. If slave devices support different groups and variations, they can be adjusted in Excel configuration. For more information check section Excel configuration.
Configuring datapoints
To use DNP3 Master in WCC Lite, it has to be configured via an Excel configuration. This configuration contains two Excel sheets where parameters have to be filled in Devices and Signals.
DNP3 Master parameters for Devices tab
| Parameter |
Type |
Description |
Required |
Default value (when not specified) |
Range |
|
|
Min |
Max |
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| name | string | User-friendly device name | Yes |
|
|
|
| description | string | Description of a device | No |
|
|
|
| device_alias | string | Alphanumeric string to identify a device | Yes | |||
| enable | boolean | Enabling/disabling of a device | No | 1 | 0 | 1 |
| protocol | string | Protocol to be used (”dnp3 serial”/”dnp3 tcp” (case insensitive)) | Yes | |||
| mode | string | Choosing between TCP, TLS and SERIAL modes . If protocol provided DNP3 TCP mode defaults to tcp and if DNP3 serial is provided mode defaults to serial | No | TCP or SERIAL | TCP, SERIAL | |
| ip | string | IP address of TCP slave device | Yes (for TCP). | |||
| bind_address | string | IP address of network adapter used to connect to slave device | No (for TCP) | 0.0.0.0 | ||
| port | integer | TCP communication port | No (for TCP) | 20000 | ||
| device | integer | Communication port (”PORT1” or ”PORT2”) | Yes (for SERIAL) |
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| baudrate | integer | Communication speed, bauds/s | No (for SERIAL) |
9600 | 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600,115200 | |
| databits | integer | Data bit count for communication | No (for SERIAL) |
8 | 6 | 9 |
| stopbits | integer | Stop bit count for communication | No (for SERIAL) |
1 | 0 | 2 |
| parity | string | Communication parity option | No (for SERIAL) |
none | none, even, odd | |
| flowcontrol | string | Communication device flow control option. | No (for SERIAL) |
none | none | |
| tls | boolean | Enable/disable use of TLS |
Yes (for TLS) |
0 | 0 | 1 |
| tls_local_certificate | string | Local certificate for TLS connection | Yes (for TLS) | |||
| tls_peer_certificate | string | Certificate authority file for TLS connection | No (for TLS) |
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| tls_private_key | string | File consisting of private key for TLS connection | No (for TLS) |
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| max_rx_frag_size | integer | Maximum size of a received fragment. | No | 2048 | 0 | 2048 |
| destination_address | integer | Address of a master station | No | 1 | 0 | 65535 |
| source_address | integer | Address of a slave (local) station. | No | 1 | 0 | 65535 |
| unsol_disable | bool | Disables unsolicited messages on startup. Overrides unsol_classes parameter. | No | 0 | 0 | 1 |
| unsol_classes | string | Defines which classes will have unsolicited actions on startup. Can be overriden with unsol_disable. (Example: "1,3,2") | No | no class | 1 | 3 |
| groups_scan_mask | integer | Bitmask for enabling separate group scans with x06 qualifier (all objects): 0 - Binary, 1 - Doublebit Binary, 2 - Binary Output Status, 3 - Counter, 4 - Frozen Counter, 5 - Analog, 6 - Analog Output Status, 7 - Octet String |
No | 0 | 0 | 7 |
| groups_scan_interval |
integer, string |
Time between separate groups scans intervals in seconds. Set to 0 to disable. | No | 0 | 0 | |
| exception_scan_interval |
integer, string |
Time between exception scan (classes 1,2,3) intervals in seconds. Set to 0 to disable. | No | 0 | 0 | |
| integrity_scan_interval |
integer, string |
Time between integrity scan (classes 0,1,2,3) intervals in seconds (general interrogation). Set to 0 to disable. | No | 0 | 0 | |
| timesync_mode | string | Will override masters default setting for choosing timesync procedure | No |
NON-LAN(for Serial) LAN (for tcp) |
LAN, NON-LAN |
|
|
time_sync_interval_sec |
integer, string |
Periodic time sync interval in seconds. If 0 < - time syncs are forced and periodic. If = 0 - time syncs react to IIN bits from slave. If < 0 - time syncs are disabled. |
No | 0 | 0 | |
| select_ms | integer | Select command timeout. Valid for all signals. | No | 10000 | ||
| timeout_ms | integer | Response timeout in milliseconds |
No |
2000 | ||
| keep_alive_timeout | integer | Time interval for sending a keep alive packet in milliseconds. |
No | 60 | ||
DNP3 Master parameters for Signals tab
| Parameter |
Type |
Description |
Required |
Default value (when not specified) |
Range |
|
|
Min |
Max |
|||||
| signal_name | string | User-friendly signal name | Yes |
|
|
|
| device_alias | string | Device alias from a Devices tab | Yes | |||
| signal_alias | Unique alphanumeric name of the signal to be used | Yes | ||||
| enable | boolean | Enabling/disabling a device | No | 1 | 0 | 1 |
| index | integer | Index of a signal. | Yes | 0 | 65535 | |
| log | boolean | Enable logging in the event log | No | 0 | 0 | |
| signal_type | string | DNP3 signal type. (case insensitive) |
Yes |
”BINARY”, |
||
| command_variation | integer |
DNP3 command variation. |
No | 0 | 0 | 4 |
| static_variation | integer | DNP3 command variation (). Supported variations depend on signal type and are provided in the table below. |
No | 0, 1, 2, 3, 4, 5, 6, 9, 10 | ||
| event_variation | integer | DNP3 command variation. Supported variations depend on signal type and are provided in the table below. |
No |
0 | 8 | |
| control_code | integer |
DNP3 control model code of CROB signal. TripClose and Pulse control model requires PulseOn/off times to be set |
No | LATCH, PULSE, TRIPCLOSE | ||
| pulse_on_time_ms | integer | Pulse ON time in milliseconds, when using Pulse or TripClose control models must be set | No | |||
| pulse_off_time_ms | integer | Pulse OFF time in milliseconds, when using Pulse or TripClose control models must be set | No | |||
| class_num | integer | Class assignment of this signal. | No | 0 | 0 | 3 |
| operate_type | integer | No | 1 | -1 | 1 | |
| job_todo | string | The device status signal can be configured by providing one of the given values. |
No | COMMUNICATION_STATUS, DEVICE_RUNNING, DEVICE_ERROR, UNKNOWN_ERROR |
||
Debugging the DNP3 Master service
If configuration for DNP3 devices is set up, handler for protocol will start automatically. If configuration is missing or contains errors, protocol will not start. It is done intentionally decrease unnecessary memory usage.
DNP3 protocol runs a service called dnp3-master. If DNP3 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. To launch a debugging session, a user should stop dnp3-master process and run dnp3-master command with respective flags as in the table given below.
Procedure for DNP3 Master protocol service debugging:
- Step 1: Service must be stopped by entering the following command into the wcclite:
/etc/init.d/dnp3-master stop - Step 2: After service is stopped it must be started with the preferred configuration file (JSON files found in /etc/ folder) and a debug level 7: dnp3-master -c /etc/dnp3-master/dnp3master.json -d7Additional output forming options described in the table below.
- Step 3: Once the problem is diagnosed normal operations can be resumed with the following command: /etc/init.d/dnp3-master start
dnp3-master command line debugging options
| Option | Description |
| -h [ –help ] | Display help information |
| -V [ –version ] | Show version |
| -p [ –port ] | Show output for one port only |
| -d <debug level> | Set debugging level |
| -c [ –config ] | Config path |
| -a [ –app ] | Show application layer data |
| –l [ –link ] | Show link layer data |
| –t [ –transport ] | Show transport layer data |
| -r [ –redis ] | Show Redis messages |
| -R [ –readyfile ] | Ready notification file |