Yaskawa iQpump Controller Programming Manual - Manual (Page 33)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 33
◆ b5-01 PI Mode
The iQpump drive can be used as a stand-alone PI controller. If PI functionality is selected by parameter b5-01, the iQpump drive will
adjust its output to cause the feedback from a transmitter to match the PI Setpoint (b5-19). The setting of b5-01 will determine whether PI
functionality is disabled (b5-01 = “0: Disabled”), enabled (b5-01 = “1: Enabled”), enabled - 2 zone (dual zone PI enabled) (b5-01 = 2).
b5-01 = 0, Disabled
PI functionality is disabled.
b5-01 = 1, Enabled (factory default)
PI functionality is enabled.
b5-01 = 2, Enabled - 2 Zone (dual zone PI enabled) <0034>
Enabled - 2 zone.
Provides automatic setpoint and feedback switching for dual zone pumping applications (geothermal).
• Terminal A1 is used as a feedback signal for “Zone 1”.
• Standard PI Feedback (H3-09 = B) as feedback for “Zone 2”.
• Based upon the two feedback levels, the drive determines which setpoint and feedback signal to use.
Figure 1.27
Figure 27. Dual Zone PI
Changes from standard product:
• When the Dual Zone PI is enabled (b5-01 = 2) Terminal A1 becomes the feedback signal for Zone 1.
• Multi-Step Frequency Reference Select digital inputs are ignored (H1-0x = 3 or 4) when the Dual Zone PI is enabled (b5-01 = 2).
• Transducer Loss Detection is enabled on Terminal A1 when b5-01 = 2.
Setting Description
0 Disabled
1 Enabled ( factory default )
2 Enabled - 2 Zone (dual zone PI enabled) <0034>
To:
Zone 1
To:
Zone 2
Zone 1
Valve
Zone 2
Valve
Yaskawa
iQpump Drive
A1 A2
T1 T2 T3
Motor Leads
Motor
Pump