Group 21: Speed Measurement - ABB DCS 500B Description

Group 21: SPEED MEASUREMENT

TACHOPULS_NR
Parameter of SPEED_MEASUREMENT-function block.
Number of pulses from the tacho when it rotates one turn.
2101 FB_P: I2
SPEED_MEAS_MODE
Parameter of SPEED_MEASUREMENT-function block.
Selects the type of speed measurement used:
0 = ENCODER A+, B dir
1 = ENCODER A+-
2 = ENCODER A+-, B dir
3 = ENCODER A+-, B +-
4 = ANALOG TACHO
5 = EMF SPEED ACT
2102 FB_P: E2
SPEED_SCALING
Parameter of SPEED_MEASUREMENT-function block.
Speed reference of the motor in 0.1 rpm, when speed reference is 20000.
Notice that when this value is changed, all speed related parameters and signals
will have different values when they are shown in [rpm] in the panel or in
CMT/DCS 500:
AITAC_HIGH_VALUE,
AI1_LOW_VALUE,
SPEEDMAX,
CONST_REF.REF1-4,
ERR.WIN_SIZE,
SPEED_L2,
MON.MEAS_LEV,
AITAC:OUT+,
AI1:OUT-,
REF_SUM:OUT,
REF_SEL.OUT,
ERR:STEP_RESP,
SPEED_ACT_FILT.
2103 FB_P: I2
SPEED_ACT_FTR
Parameter of SPEED_MEASUREMENT-function block.
Filter time constant for the speed actual filter.
Output of the filter is the signal SPEED_ACT (12102).
2104 FB_P: I2
SPEED_ACT_FLT_FTR
Parameter of SPEED_MEASUREMENT-function block.
Filter time constant for the signal SPEED_ACT_FILT (12103).
This speed actual is intended for display on panel or CMT.
2105 FB_P: I2
SC: 1 HL: 10000
(ch. A: pos. edges for speed; ch B: direction)
(ch. A: pos. and neg. edges for speed; ch. B: not used)
(ch. A: pos. and neg. edges for speed; ch. B: direction)
(all edges of the channels A and B are used)
(AI channel AITAC is used for analog tacho input)
(speed actual is calculated from EMF of motor)
SC: - HL: 5
AITAC_LOW_VALUE,
FIELD_WEAK_POINT,
SPEEDMIN,
SOFTPOT.OHL,
MIN_SPEED_L,
OVERSPEEDLIMIT,
MAX_CURR_LIM_SPD,
AITAC:OUT-,
RAMP:OUT,
LOCAL_SPEED_REF,
SOFTPOT:OUT,
SPEED_ACT_EMF,
SC: 0.1 HL: 65000
SC: 1 HL: 1000
SC: 1 HL: 20000
DCS500 Pin and Parameter list
LL: 125 D: 2048
LL: 0 D: 5
AI1_HIGH_VALUE,
GENER.WEAK_POINT,
CONST_REF.DEF,
SOFTPOT.OLL,
SPEED_L1,
STALL.SPEED,
AI1:OUT+,
SPEED REFERENCE,
CONST_REF:OUT,
ERR:OUT,
SPEED_ACT,
LL: 1000 D: 15000
LL: 0 D: 0
LL: 0 D: 500
( S4/16 )
U: -
( S4/16 )
U: -
( S4/16 )
U: rpm
( S4/16 )
U: ms
( S4/16 )
U: ms
A 54