YASKAWA T1000A - Page 135

5.2 b: Application
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 135
Parameter Details
5
n b5-20: PID Setpoint Scaling
Determines the units that the PID setpoint (b5-19) is set in and displayed. Also determines the units for monitors U5-01
and U5-04.
Setting 0: 0.01 Hz units
The setpoint and PID monitors are displayed in Hz with a resolution of 0.01 Hz.
Setting 1: 0.01% units (100% = max. output frequency)
The setpoint and PID monitors are displayed as a percentage with a resolution of 0.01%.
Setting 2: r/min units (set the no. of motor poles)
The setpoint and PID monitors are displayed in r/min with a resolution of 1 r/min.
Setting 3: User-set units (use b5-38, b5-39)
Parameters b5-38 and b5-39 determine the units and resolution used to display the values the setpoint in b5-19, and PID
monitors U1-01 and U1-04.
n
b5-34: PID Output Lower Limit
Sets the minimum possible PID controller output as a percentage of the maximum output frequency (E1-04). The lower
limit is disabled when set to 0.00%
n
b5-35: PID Input Limit
Sets the maximum allowed PID input as a percentage of the maximum output frequency (E1-04). Parameter b5-35 acts as
a bipolar limit.
n
b5-38, b5-39: PID Setpoint User Display, PID Setpoint Display Digits
When parameter b5-20 is set to 3, the parameters b5-38 and b5-39 can be used to set a user defined display for the PID
setpoint (b5-19) and PID feedback monitors (U5-01, U5-04).
Parameter b5-38 determines the display value when the maximum frequency is output. Parameter b5-39 determines the
number of digits. The setting value is equal to the number of decimal places.
n
b5-40: Frequency Reference Monitor Content During PID
Sets the content of the frequency reference monitor display (U1-01) when PID control is active.
Setting 0: Frequency Reference after PID
Monitor U1-01 displays the frequency reference increased or reduced for the PID output.
Setting 1: Frequency Reference
Monitor U1-01 displays the frequency reference value.
No. Parameter Name Setting Range Default
b5-20 PID Setpoint Scaling 0 to 3 1
No. Name Setting Range Default
b5-34 PID Output Lower Limit -100.0 to 100.0% 0.00%
No. Name Setting Range Default
b5-35 PID Input Limit 0 to 1000.0% 1000.0%
No. Name Setting Range Default
b5-38
PID Setpoint User Display
1 to 60000 Determined by b5-20
b5-39
PID Setpoint Display Digits
0 to 3 Determined by b5-20
No. Name Setting Range Default
b5-40 Frequency Reference Monitor Content During PID 0 or 1 0