ABB SPA-Bus communication protocol
Supported device types and versions
Communication line configuration
Communication line parameters
Station configuration
Station parameters
I/O tag configuration
Literature
Changes and modifications
Document revisions
Supported device types and versions
The protocol support data reading/writing from digital high-voltage circuit-breakers produced by ABB.
Communication line configuration
- Communication line category: Serial, SerialOverUDP Device Redundant.
- Transmission parameters are set to 9600 Baud, 7 data bits, even parity, 1 stop bit.
Communication line parameters
Communication line - configuration dialog - Protocol parameters tab.
The parameters influence some optional protocol parameters. The following protocol line parameters can be used:
Table 1
| Parameter | Meaning | Unit / Size | Default value |
|---|---|---|---|
Software 7E1 | Parameter starts a software generation and even parity checking. A transmission device parameters can be set on 8N1 (i.e. 8 bits, no parity, 1 stop bit) instead of 7E1 (7 bits, even parity, 1 stop bit) which is commonly used in the SPA-Bus protocol. | YES/NO | NO |
Moxa Redundancy Check Timeout | Switching time for redundant serial servers (e.g. Moxa N-Port devices) in case of a communication error. This parameter is only relevant for SerialOverUDP Device Redundant line. | sec | 5 sec |
Max. Data Number Optimization | Optimization data reading for polling. If there are I/O tags with Data Number successive addresses, the polling is executed together until the value of this parameter is reached (i.e. if the value is 3, three I/O tags will be polled together). Value 1 switches an optimization off, each I/O tag is polled separately. | 1 .. 32 | 1 |
Time T Broadcast Periode | The period of sending a Time synchronization (T) packet by broadcast to address 900. When the parameter is 0 seconds., the time synchronization is disabled. | 0 .. 60 sec | 10 sec |
Expected T Packet Transmission Duration | Expected duration of transfer of a time synchronization (T) packet by all the transmitting devices until the whole packet is received in the protection device itself. This time is added to a current time when the packet is being sent so that the time in the packet is a current time at the moment when the T packet is completely received by the device. | msec | 20 msec |
Date and Time D Broadcast Periode | Period of sending a Time and Date synchronization (D) packet by a broadcast to address 900. When the parameter is 0 seconds, the sending of synchronization is disabled. | 0 .. 3600 sec | 60 sec |
Expected D Packet Transmission Duration | Expected duration of transfer of a Time and Date synchronization (D) packet by all the transmitting devices until the whole packet is received in the protection device itself. This time is added to a current time when the packet is being sent so that the time in the packet is a current time at the moment when the D packet is completely received by the device. | msec | 35 msec |
Station configuration
- Communication protocol: ABB SPA-Bus.
- The station address is a number in the range of 1 to 999, 0 is not used, 900 is reserved for broadcast.
- Time parameter settings - Polling parameters, are ignored, the polling of the values is executed in the shortest possible period.
- Time parameter - Synchronization time, is ignored, a real-time synchronization via the broadcast messages is controlled by the protocol line parameters "Time T Broadcast Period" and "Date and Time D Broadcast Period".
Station parameters
Communication station - Protocol parameters tab.
The parameters influence some optional protocol parameters. The following protocol line parameters can be used:
Table 2
| Parameter | Meaning | Unit | Default value |
|---|---|---|---|
Retry Count | A number of the request repetitions in case of a communication failure. | 1 .. 20 | 2 |
Retry Timeout | The delay between a request retry in case of a communication failure. | msec | 20 msec |
Wait First Timeout | First waiting for a response after sending the request. | msec | 50 msec |
Wait Timeout | The delay between individual readings of the response until it is completed. | msec | 20 msec |
Max. Wait Retry | The maximum number of response readings until it is completed. | - | 20 |
Recovery Delay | Communication with the station is delayed by defined time in case of a communication error. If a line contains more stations (protective devices) and one of them fails, it can slow down the communication to other functioning stations. Next recovery of the communication with a failed station will be delayed by a defined value (time). If the line contains only a single station, the parameter value should be 0 seconds. | sec | 10 sec |
Poll Events | This parameter activates a periodic event reading by the function "Last events L". Time synchronization of the protective device must be also enabled. See the communication line parameters "Time T Broadcast Periode" and "Date and Time D Broadcast Periode". | YES/NO | YES |
Value For Invalid Position | An integer value of "ERROR" state for conversion to a quadrat input Qi. | 0, 1, 2, 3 | 3 |
Value For Off/Open Position | An integer value of "OFF" state for conversion to a quadrat input Qi. | 0, 1, 2, 3 | 1 |
Value For On/Close Position | An integer value of "ON" state for conversion to a quadrat input Qi. | 0, 1, 2, 3 | 2 |
Value For Intermediate Position | An integer value of "TRANS" state for conversion to a quadrat input Qi. | 0, 1, 2, 3 | 0 |
Date Conversion Mask | Conversion mask to convert date values. | yyyy-mm-dd | |
Time Conversion Mask | Conversion mask to convert time values. | hh.mi;ss.mss | |
Debug Values | This parameter activates a detailed debug info about I/O tag values obtained by polling. | YES/NO | NO |
I/O tag configuration
Possible value types: Ai, Ao, Ci, Co, Di, Dout, Qi, TxtI, TxtO, TiA, ToA, TiR, ToR.
I/O tag address items:
- Channel: channel number is a required numerical address parameter intended for all data categories except for F and C.
- Category: data category code; if it is unknown, select "Not defined", if it is known, you can choose one of the following data categories:
- Input data I
- Output data O
- Setting Values S
- Variable V
- Memory data M
- Slave identification F
- Slave status C
"Slave Identification F" and "Slave Status C" categories don't require specifying of any other address parameter. The value is unique within the device.
"Slave identification F" returns 10 characters which identify a device. We recommend to configure it as I/O tag of TxtI type.
"Slave status C" returns a number 0, 1, 2 or 3. See also Note 1.
- Data Number: a mandatory numerical address parameter for all data categories except for F and C.
- Poll: enables periodic polling for all data categories except for "Not defined". The data category "Slave identification F" does not require periodic polling because it is static data. If the periodic polling is disabled, the object is polled only when the communication is started or when I/O tag value is unknown.
- Event code - Intermediate position (00): a numerical address of event when the object goes to "Intermediate position". A value of "TRANS" can be set for Qi I/O tag type or a numerical value according to the protocol parameter "Value for intermediate position" for I/O tags of Ai, Ao, Ci, Co types. A configuration is not allowed for I/O tags of Di, Dout types.
- Event code - Off/Open position: a numerical address of event when the object goes to "Off/Open position". A value of "OFF" can be set for Qi I/ tag type or a numerical value according to the protocol parameter "Value for Off/Open position" for Ai, Ao, Ci, Co I/O tags.
- Event code - On/Close position: a numerical address of event when the object goes to "On/Close position". A value of"ON" can be set for Qi I/O tag type or a numerical value according to the protocol parameter "Value for On/Close position" for Ai, Ao, Ci, Co I/O tags.
- Event code - Invalid position (11): a numerical address of event when the object goes to "Invalid position". A value of"ERROR" can be set for Qi I/O tag type or a numerical value according to the protocol parameter "Value for invalid position" for Ai, Ao, Ci, Co I/O tags. The configuration is not allowed for Di, Dout I/O tags.
Note 1
When E50 (slave reset) or E51 (slave event buffer overflow) events occur, the value is written to the "Slave status C" category object with address 0, regardless of whether the I/O tag of C category exists or not.
Literature
- SPA-Bus Communication Protocol V2.5, Technical description, Version C, 1MRS 750076-MTD EN.
Changes and modifications
Document revision
- Ver. 1.0 - November 21st, 2010 - Document creation.
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