ABB ACSM1 Series, Manual

Page: 384 / 510

Standard function blocks
384
Outputs Y value output (Y): DINT, INT, REAL, REAL24
Balance reference output (BALREFO): DINT, INT, REAL, REAL24
Error output (ERROR): Boolean
INT
(10065)
Illustration
Execution time 4.73 µs
Operation The output (O) is the integrated value of the input (I):
O(t) = K/TI (

I(t) dt)
Where TI is the integration time constant and K is the integration gain.
The step response for the integration is:
O(t) = K × I(t) × t/TI
The transfer function for the integration is:
G(s) = K 1/sTI
The output value is limited according to the defined minimum and maximum limits (OLL
and OHL). If the value is below the minimum value, output O = LL is set to 1. If the value
exceeds the maximum value, output O = HL is set to 1. The output (O) retains its value
when the input signal I(t) = 0.
The integration time constant is limited to value 2147483 ms. If the time constant is
negative, zero time constant is used.
If the ratio between the cycle time and the integration time constant Ts/TI < 1, Ts/TI is
set to 1.
The integrator is cleared when the reset input (RINT) is set to 1.
If BAL is set to 1, output O is set to the value of the input BALREF. When BAL is set
back to 0, normal integration operation continues.
Inputs Input (I): REAL
Gain input (K): REAL
Integration time constant input (TI): DINT, 0…2147483 ms
Integrator reset input (RINT): Boolean
Balance input (BAL): Boolean
Balance reference input (BALREF): REAL
Output high limit input (OHL): REAL
Output low limit input (OLL): REAL
INT
61
TLA1 1 msec (1)
I
K
TI
RINT
BAL
BALREF
OHL
OLL
O
O(61)
O=HL
O=HL(61)
O=LL
O=LL(61)