Yaskawa iQpump Controller Programming Manual - Manual (Page 37)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 37
◆ b5-08 PI Primary Delay Time Constant
Setting Range: 0.00 ~ 10.00 s
Factory Default: 0.00 s
Acts as a time based filter that lowers the responsiveness of the PI function, but also makes the function more stable when the setpoint
varies rapidly or when the feedback is noisy.
◆ b5-09 PI Output Level Selection
Normally, the output of the PI function causes an increase in motor speed whenever the measured feedback is below the setpoint. This is
referred to as direct acting response. However, if b5-09 = “1: Reverse Output,” the output of the PI function causes the motor to slow
down when the feedback is below the setpoint. This is referred to as reverse acting response.
◆ b5-10 PI Output Gain Setting
Setting Range: 0.0 ~ 25.0
Factory Default: 1.0
Applies a multiplier to the output of the PI function. Using the gain can be helpful when the PI function is used to trim the Speed
Command. Increasing b5-10 causes the PI function to have a greater regulating affect on the speed command.
◆ b5-12 PI Feedback Reference Missing Detection Selection
Loss of feedback can cause problems to a PI application. The iQpump drive can be programmed to turn on a digital output whenever a
loss of feedback occurs. Feedback Loss Detection (FBL) is turned on by b5-12. When b5-12 = “1: Alarm,” the iQpump drive
acknowledges the loss of feedback without stopping or turning on the fault output (MA-MB). If b5-12 = “2: Fault,” the iQpump drive
coasts to a stop and turns on the fault output if the feedback is determined to be lost.
The Feedback Loss Detection can be disabled during the following conditions:
• Pre-charge Level (P4-01) is set to 0.
• Thrust Bearing acceleration or deceleration.
Note: A Feedback Loss Detection (FBL) will occur when the Thrust Bearing function is enabled and a run command given, P1
Feedback Loss Detection Time (b5-14) is set to 0, and P1 Feedback is below Feedback Loss Detection Level (b5-13).
Function Description <0034>
This parameter also allows feedback loss detection to also function as a wire break detection when the signal type is 4 ~ 20mA. The Wire-
break Feedback Loss Detection will still be active when b5-13 = 0%.
Wire break will be detected on Terminal A2 when:
• PI Feedback Loss Detection is enabled (b5-12 = 1 or 2)
• PI is enabled (b5-01 > 0)
• Terminal A2 9s set for PI Feedback (H3-09 = B)
• Terminal A2 is set for 4 ~ 20 mA (H3-08 = 2)
• PI is NOT disabled via Multi-Function Digital Input
• Signal on Terminal A2 goes below 3 mA or above 21 mA for more than 1 s.
Note: Wire break detection on Terminal A2 is unaffected by the gain / bias parameters H3-10 and H3-11.
Wire break will be detected on Terminal A1 when:
• PI Feedback Loss Detection is enabled (b5-12 = 1 or 2)
Setting Description
0 Normal Output (direct acting) ( factory default )
1 Reverse Output (reverse acting)
Setting Description
0 Disabled
1 Alarm
2 Fault ( factory default )