Yaskawa iQpump Programming Manual - Manual (Page 55)

YASKAWA TM.iQp.02 iQpump Drive Programming Manual 55
Function: PI SFS Cancel (Setting: 34)
SFS means softstart, also referred to as accel/decel in this description.
By configuring a digital input as a PI SFS (softstart) Cancel input (H1-0x = 34), the operator will be able to use a contact closure to
remove the acceleration and deceleration times that are applied to changes in the PI setpoint by the b5-17 parameter. If the digital input
configured as PI SFS Cancel is closed, the PI setpoint Accel/Decel (Parameter b5-17) will be ignored. Immediate updating of any change
to the setpoint will apply.
Function: Input Level Sel (Setting: 35)
When using the PI Function built into the Drive, the chosen setpoint is compared with the measured feedback. The difference is called the
Error. The proportional and integral function are applied to this error. For some applications it may be appropriate to invert the input to
the PI block. This can be accomplished by setting one of the digital inputs up as an Input Level Sel (H1-0x=35). When an Input Level Sel
digital input is closed the Error will be inverted before it is passed to the PI block.
Figure 1.40
Figure 40 PI Error signal Inversion Block Diagram
Function: Option/Inv Sel 2 (Setting: 36)
The Option/Inv Selection function allows the user to switch the source of the Run and speed command between the Drive’s terminals and
optional communication card. When a digital input is programmed for the Option/Inv Selection 2 function (H1-0x = 36) that input will
function as follows:
Table 12 Programming Choices
To switch the command source between the option card and the terminals be sure to program the following parameters:
• Set b1-01 (Frequency Reference Selection) to 1 (Terminals).
• Set b1-02 (Run Command Selection) to 1 (Terminals).
• Set H1-0x (Input Terminal Function Selection) to 36.
Important: Switching the Reference and RUN sources can only be done while the iQpump drive is stopped.
Option/Inv Function Input Status Run and Speed Command Source
CLOSED From the Communications Option Card
OPEN From the control circuit and analog input terminals
Set
Point
+
-
Z -1
PI Block
Feed
back
H1=0x=35
OP
CLOSED
Open
Closed