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In addition to the spontaneous data transfer the
SPA bus allows reading of all input values (I-
values), setting values (S-values), information
recorded in the memory (V-values), and some
other data. Further, part of the data can be
altered by commands given over the SPA bus.
All the data are available in channel 0.
R = data to be read from the unit
W = data to be written to the unit
(P) = writing enabled by password
Data Code Data Values
direction
INPUTS
Current on phase L1 I1 R 0...63 x I
n
Current on phase L2 I2 R 0...63 x I
n
Current on phase L3 I3 R 0...63 x I
n
Neutral current I4 R 0...21 x I
n
Blocking or control signal I5 R 0 = no blocking
1 = external blocking or
control signal active
OUTPUTS
Starting of stage I> O1 R 0 = I> stage not started
1 = I> stage started
Operation of stage I> O2 R 0 = I> stage not tripped
1 = I> stage tripped
Starting of stage I>> O3 R 0 = I>> stage not started
1 = I>> stage started
Operation of stage I>> O4 R 0 = I>> stage not tripped
1 = I>> stage tripped
Starting of stage I
0
> O5 R 0 = I
0
> stage not started
1 = I
0
> stage started
Operation of stage I
0
> O6 R 0 = I
0
> stage not tripped
1 = I
0
> stage tripped
Starting of stage I
0
>> O7 R 0 = I
0
>> stage not started
1 = I
0
>> stage started
Operation of stage I
0
>> O8 R 0 = I
0
>> stage not tripped
1 = I
0
>> stage tripped
Signal START1 TS1 O9 R, W (P) 0 = signal not active
1 = signal active
Signal START2 SS1 O10 R, W (P) 0 = signal not active
1 = signal active
Signal ALARM1 SS2 O11 R, W (P) 0 = signal not active
1 = signal active
Signal ALARM2 SS3 O12 R, W (P) 0 = signal not active
1 = signal active
Signal TRIP TS2 O13 R, W (P) 0 = signal not active
1 = signal active
Operate output relays O41 R, W (P) 0 = not operated
1 = operated
Data to be trans-
ferred via the fibre-
optic serial bus
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