Mecc Alte DER2, Technical Manual

Page: 21 / 36

DER2 digital regulator instruction manual - rev. 02 - pag. 21
NOTE (1): depending on the sensing and nominal frequency
NOTE (2): software configuration, with jumper 50/60 disabled
TABLE 10 :STANDARD VALUES OF THE FOURTH STATUS WORD (LOCATION L[39])
Sensing
50Hz 60Hz
Single phase 7988 24372
Three phase 8048 24432
Rated frequency:
Bit Function Value
Default
B0 Not used 1 0
B1 Bit activating a periodical variation of reference voltage 2 0
B2 Bit activating automatic compensation of the offset in voltage acquisition channels 4 0/1 (1)
B3 Not used 8 0
B4 Bit enabling reading of 50/60 Hz jumper hardware 16 1
B5 Inversion APO 32 1
B6 Three phase sensing active 64 0
B7 Voltage remote control by RAM location L[49] or input saturation ( in case of overflow ) 128 0
B8 Bit enabling reading of reference voltage by VOLT Trimmer 256 1
B9 Bit enabling reading of stability parameter by STAB Trimmer 512 1
B10 Bit enabling reading of underspeed protection threshold by Hz Trimmer 1024 1
B11 Bit enabling reading of excitation current threshold by AMP Trimmer 2048 1
B12 Bit enabling reading of external voltage input 4096 1
B13 Bit enabling DAC 8192 0
B14 60Hz active setting (jumper 60Hz closed and/or 60Hz active setting on configuration menu)
(2)
16384 0/1 (1)
B15 Reserved 32768 0
TABLE 11 : BIT FUNCTION OF THE FOURTH STATUS WORD L[39] ( ACTIVE CONFIGURATION )
4. Volatile memory addresses
Add.
Add name Range Access Description
32 VOLT Trimmer 0..32767 Read only VOLT Trimmer Position
33 STAB Trimmer 0..32767 Read only STAB Trimmer Position
34 Hz Trimmer 0..32767 Read only Hz Trimmer Position
35 AMP Trimmer 0..32767 Read only AMP Trimmer Position
36 First status word 0..3200 Read only Regulated voltage [tenths of volts]
37 Second status word 0..900 Read only Frequency [tenths of Hz]
38 Third status word 16bit Read only Active alarms
39 Fourth status word 16bit Read only Active configuration
40 Commands 16bit Write Reserved Word Commands – Do not use
41 Pext/Vext Inputs 0..32767 Read only Analogical input or external potentiometer value
42 Setpoint 0..32767 Read only Setpoint value
43 Setpoint 0..32767 Read only Value modified by regulator in case of alarms, soft-start, etc.
44 Measured Voltage 0..32767 Read only Internal variable
45 Estimated temperture 0..32767 Read only Estimates temperature of exciter windings
… … …
49
Reference corresponding to Vext
0..32767 Write Used if Vext input is disabled and voltage remote
control by RAM location is enabled (P[10]-Bit B7=1)
50 Peak to peak voltage 0..32767 Read only Internal variable
51 Three phase switch threeshold 0..32767 Read only Internal variable
52 Offset voltage 0..32767 Read only Internal variable (active only in single phase sensing)
56 Underexcitation observer 0..32767 Read only Observer of underexcitation or loss of excitation
TABLE 9 : VOLATILE MEMORY ADDRESSES
55 AMP protection threshold 0..32767 Read only Intervention threshold of overexcitation protection
(1)
54 Ki/2
P[12]
0..32767 Read only Integral gain not considering factor 2
P[12] (1)
53 Kp/2
P[11]
0..32767 Read only Proportional gain not considering factor 2
P[11] (1)
5. Fourth Status Word (Location L[39])
Location L[39] indicates (almost in real time) the active configuration at any given time; it is not a simple
replication of the value recorded in parameter P[10], however, inasmuch as the bits B2, B6 and B14 adjust
their value only on the basis of the configuration set, but also of the effective operational status of the
DER2 at that time; for example, if the regulator is connected with three phase sensing, even if bit B6 of the
configuration word is set on 0 (automatic recognition of single phase – three phase activation), bit B6 of
location L[39] will have a value of 1; similarly, if the 60 Hz jumper is engaged and reading is enabled 8Bit
B4 of parameter P[10] set on 1), bit B14 of location L[39] will have a value of 1 even if the corresponding
bit B14 of the configuration word is set on 0.
The values of the fourth word of status (location L[39]) are shown in table 10, on the basis of the type of
the regulation and nominal frequency.