Spa Bus Communication Protocol Parameters - ABB REU 610 Technical Reference Manual

1MRS755769
Phase-to-phase voltage U
Internal scaling factor
Default DNP range
5.1.17.
Voltage Relay
Technical Reference Manual
Scaling DNP analog values
The DNP analog values can be scaled using either an internal (fixed) or a user-
defined scaling factor. If the scaling factor index for a certain analog value is set to
0, the internal scaling factor is used. If set to 1...5, the user-defined scaling factor of
the corresponding scaling factor parameter, SPA parameter 503V (100+index), is
used:
Scaling factor 1
503V101
Scaling factor 2
503V102
Scaling factor 3
503V103
Scaling factor 4
503V104
Scaling factor 5
503V105
Example:
12
To show the analog value in primary units, and if U
1. Take any unused scaling factor and set it to 20000.
2. Set the scaling index pointer of the analogue value to point at the scaling factor.
3. The value range is now 0.00 × 20000...2.00 × 20000 = 0...20000 V.
DNP analog values deadband
The deadband is always defined in units of the original value when scaled using the
internal (fixed) scaling factor, irrespective of whether the internal scaling factor is
used for value presentation or not.
Example:
For a deadband of 2% U
deadband value is set as follows: 0.02 × 100 = 2. If the scaling factor is set to
20 kV, the scaled deadband is 20 kV × 0.02 = 400 V

SPA bus communication protocol parameters

Altering parameter values via serial communication requires the use of the SPA
password in some cases. The password is a user-defined number within the range
1...999, the default value being 001. SPA parameters are found on channels 0...5,
503...504, 507 and 601...603.
To enter the setting mode, enter the password into parameter V160. To exit the
setting mode, enter the same password into parameter V161. The password
protection is also reactivated in case of loss of auxiliary voltage.
The password can be changed with parameter V162, but it is not possible to read
the password via this parameter. Abbreviations used in the following tables:
0...2 × U
n
100
0... 200
= 20000 V:
n
when the internal scaling factor is 100, the
n
REU 610
85