ABB ACS580 - Page 320

316 Parameters
71.06 PID status word Displays status information on process external PID control.
This parameter is read-only.
-
0000h…FFFFh Process PID control status word. 1 = 1
71.07 PID operation mode See parameter 40.07 Process PID operation mode. Off
71.08 Feedback 1 source See parameter 40.08 Set 1 feedback 1 source. AI2 percent
71.11 Feedback filter time See parameter 40.11 Set 1 feedback filter time. 0.000 s
71.14 Setpoint scaling Defines, together with parameter 71.15 Output scaling, a
general scaling factor for the external PID control chain. The
scaling can be utilized when, for example, the process
setpoint is input in Hz, and the output of the PID controller is
used as an rpm value in speed control. In this case, this
parameter might be set to 50, and parameter 71.15 to the
nominal motor speed at 50 Hz.
In effect, the output of the PID controller [71.15] when
deviation (setpoint - feedback) = [71.14] and [71.32] = 1.
Note: The scaling is based on the ratio between 71.14 and
71.15. For example, the values 50 and 1500 would produce
the same scaling as 1 and 3.
1500.00
-32768.00…
32767.00
Process setpoint base. 1 = 1
71.15 Output scaling See parameter 71.14 Setpoint scaling. 1500.00
-32768.00…
32767.00
Process PID controller output base. 1 = 1
71.16 Setpoint 1 source See parameter 40.16 Set 1 setpoint 1 source. AI1 percent
71.19 Internal setpoint
sel1
See parameter 40.19 Set 1 internal setpoint sel1. Not selected
71.20 Internal setpoint
sel2
See parameter 40.20 Set 1 internal setpoint sel2. Not selected
71.21 Internal setpoint 1 See parameter 40.21 Set 1 internal setpoint 1. 0.00 PID
customer
units
71.22 Internal setpoint 2 See parameter 40.22 Set 1 internal setpoint 2
. 0.00 PID
customer
units
No. Name/Value Description Def/FbEq16
Bit Name Value
0 PID active 1 = Process PID control active.
1 Reserved
2 Output frozen 1 = Process PID controller output frozen. Bit is set if parameter
71.38 Output freeze enable is TRUE, or the deadband function is
active (bit 9 is set).
3…6 Reserved
7 Output limit high 1 = PID output is being limited by par. 40.37.
8 Output limit low 1 = PID output is being limited by par. 40.36.
9 Deadband active 1 = Deadband is active.
10…11 Reserved
12 Internal setpoint
active
1 = Internal setpoint active (see par. 40.16…40.16)
13…15 Reserved
ACS580 FW.book Page 316 Wednesday, September 21, 2016 9:48 PM