ABB RELION 670 Series Technical Manual page 1159

1MRK 502 066-UUS B
18.7.3 Settings
Table 853: SPA Non group settings (basic)
Name Values (Range)
SlaveAddress 1 - 899
BaudRate 300 Bd
1200 Bd
2400 Bd
4800 Bd
9600 Bd
19200 Bd
38400 Bd
Table 854: LONSPA Non group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
SlaveAddress 1 - 899
18.7.4 Operation principle
The SPA bus uses an asynchronous serial communications protocol (1 start bit, 7 data bits + even
parity, 1 stop bit) with data transfer rate up to 38400 bit/s. For more information on
recommended baud rate for each type of IED, refer to Technical reference manual. Messages on
the bus consist of ASCII characters.
Introduction of SPA protocol
The basic construction of the protocol assumes that the slave has no self-initiated need to talk to
the master but the master is aware of the data contained in the slaves and, consequently, can
request required data. In addition, the master can send data to the slave. Requesting by the
master can be performed either by sequenced polling (for example, for event information) or only
on demand.
The master requests slave information using request messages and sends information to the
slave in write messages. Furthermore, the master can send all slaves in common a broadcast
message containing time or other data. The inactive state of bus transmit and receive lines is a
logical "1".
SPA protocol
The tables below specify the SPA addresses for reading data from and writing data to an IED with
the SPA communication protocol implemented.
The SPA addresses for the mA input service values (MIM3 to MIM16) are found in table 855.
Technical manual
Unit Step Default
- 1 30
- - 9600 Bd
Unit Step Default
- - Disabled
- 1 30
Station communication
Description
Slave address
Baudrate on serial line
Description
Operation
Slave address
Section 18
IP14403-1 v2
PID-6195-SETTINGS v4
PID-6194-SETTINGS v4
IP14401-1 v3
M11880-3 v2
M11880-7 v2
M11880-10 v5
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