14.4.6.9
Analog signals
Up to 40 analog signals can be selected for recording by the Disturbance recorder and
triggering of the Disturbance report function. Out of these 40, 30 are reserved for external
analog signals from analog input modules via preprocessing function blocks (SMAI) and
summation block (3PHSUM). The last 10 channels may be connected to internally
calculated analog signals available as function block output signals (phase differential
currents, bias currents and so on).
en05000653-2.vsd
A3RADR
A2RADR
A1RADR
SMAI
AI1
AI2
AI3
AI4
AI3P
AI1NAME
AI2NAME
AI3NAME
GRPNAME
AI4NAME
GRPINPUT1
GRPINPUT2
GRPINPUT3
GRPINPUT4
GRPINPUT5
GRPINPUT6
...
A4RADR
INPUT31
INPUT32
INPUT33
INPUT34
INPUT35
INPUT36
...
INPUT40
Internal analog signals
External analog
signals
AIN
IEC05000653 V2 EN
Figure 256:
Analog input function blocks
The external input signals will be acquired, filtered and skewed and (after configuration)
available as an input signal on the AxRADR function block via the SMAI function block.
The information is saved at the Disturbance report base sampling rate (1000 or 1200 Hz).
Internally calculated signals are updated according to the cycle time of the specific
function. If a function is running at lower speed than the base sampling rate, Disturbance
recorder will use the latest updated sample until a new updated sample is available.
Application configuration tool (ACT) is used for analog configuration of the Disturbance
report.
The preprocessor function block (SMAI) calculates the residual quantities in cases where
only the three phases are connected (AI4-input not used). SMAI makes the information
Section 14
1MRK 502 048-UUS A
Monitoring
572
Technical manual
