Yaskawa iQpump Controller Programming Manual - Manual (Page 34)

34 YASKAWA TM.iQp.07 iQpump Controller Programming Manual
Dual Zone PI Operation:
In order to enable the Dual Zone PI Operation:
b5-01 = 2 The PI Mode Setting Parameter must be set to “Enabled - 2 Zone”.
P1-01 = 0 Simplex mode only.
b5-09 = 0 Output Level Select set to “Normal Output” (Not Inverse PI Control).
When Dual Zone PI Operation is enabled:
• When the drive is in auto mode, the digital operator display will change as noted in Table 6 on page 32 .
• Terminal A1 becomes a PI feedback, assigned to Zone 1.
• Standard PI feedback is assigned to Zone 2 (requires H3-09 = B).
• If feedback on Terminal A1 within the P4-17 value of the feedback on Terminal A2, the drive will use the d1-04 parameter as the
setpoint. It will use either Terminal A1 or Terminal A2 as feedback depending on which one is higher. The feedback signal(s) need to
be different for more than 5 seconds before any switching between the two will occur.
• If the feedback on Terminal A1 is more than the feedback on Terminal A2 plus the P4-17 value for more than 5 seconds, the drive will
then operate off of the Zone 1 setpoint (d1-02) and the Zone 1 feedback (Terminal A1).
• If the feedback on Terminal A2 is more than the feedback on Terminal A1 plus the P4-17 value for more than 5 seconds, the drive will
then operate off of the Zone 2 setpoint (d1-03) and the Zone 2 feedback (Terminal A2).
From the main “Auto Mode” display see Table 6 on page 32 , if the <Data / Enter> key is pressed, the currently active setpoint will be
editable.
Note: To convert Terminal A1 to a 4 - 20 mA signal, connect a 250 Ohm precision resistor (1/4 Watt or greater) between A1
and AC. Then program H3-02 = 231.3% and H3-03 = 25.0%.
Table 7 Dual Zone PI
Pressure Condition Feedback Signal Setpoint Parameter Used
“Auto Mode”
Digital Operator Display
Zone 1 = Zone 2
(+/- P4-17)
Whichever is higher
(Terminal A1 or A2)
d1-04
Zone 1 > Zone 2 + P4-17
Whichever is higher
(Terminal A1 or A2)
d1-02
Zone 1 < Zone 2 - P4-17
Whichever is higher
(Terminal A1 or A2)
d1-03
Set-Pt Zones 1&2
85 PSI
0.00 Hz
82.3 PSI
Set-Point Zone 1
85 PSI
0.00 Hz
82.3 PSI
Set-Point Zone 2
85 PSI
0.00 Hz
82.3 PSI