ABB ACSM1 Series, Manual

Page: 133 / 510

Parameters and firmware blocks
133
Group 13 ANALOGUE INPUTS
Settings for the analogue inputs.
The drive offers two programmable analogue inputs, AI1 and AI2. Both inputs can be
used either as a voltage or a current input (-11…11 V or -22…22 mA). The input type
is selected with jumpers J1 and J2 respectively on the JCU Control Unit.
The inaccuracy of the analogue inputs is 1% of the full scale range and the
resolution is 11 bits (+ sign). The hardware filter time constant is approximately 0.25
ms.
Analogue inputs can be used as the source for speed and torque reference.
Analogue input supervision can be added with standard function blocks. See chapter
Standard function blocks .
13
Firmware block:
AI1
(12)
Filters and scales the analogue input
AI1 signal and selects the AI1
supervision. Also shows the value of
the input.
Block outputs located in other
parameter groups 2.04 AI1 (page 94 )
2.05 AI1 SCALED (page 94 )
13.01 AI1 FILT TIME FW block: AI1 (see above)
Defines the filter time constant for analogue input AI1.
Note: The signal is also filtered due to the signal interface hardware (approximately 0.25 ms time
constant). This cannot be changed by any parameter.
0…30 s Filter time constant for AI1.
13.02 AI1 MAX FW block: AI1 (see above)
Defines the maximum value for analogue input AI1. The type is selected with jumper J1 on the JCU
Control Unit.
-11…11 V / -22…22 mA Maximum AI1 input value.
AI1
23
TLF7 2 msec (6)
13.01 AI1 FILT TIME
[ 0.000 s ]
13.02 AI1 MAX
[ 10.000 mA ]
13.03 AI1 MIN
[ -10.000 mA ]
13.04 AI1 MAX SCALE
[ 1500.000 ]
13.05 AI1 MIN SCALE
[ -1500.000 ]
2.04 AI1
2.05 AI1 SCALED
63
%
100
T
t
Filtered signal
Unfiltered signal
O = I · (1 - e
-t/T
)
I = filter input (step)
O = filter output
t = time
T = filter time constant