Technical Tip: How to Connect and Troubleshoot Transducer Feedback
Product(s): iQpump1000 and iQpump Micro Drives Doc. No. TN.iQp.03
This Technical Tip assists users in applying Yaskawa iQpump1000 and iQpump Micro
products to pump systems and provides useful information on:
running without a transducer
fixing Fdb-L or Feedback Loss faults/alarms
proper transducer wiring
settings for voltage or current transducers
multiple transducer wiring
What feedback transducers work with iQpump?
Yaskawa’s iQpump1000 and iQpump Micro drives utilize transducer feedback to change
pump speed to optimize system efficiency and performance.
iQpump drives typically interface with either pressure, flow, and/or temperature transducers;
most commonly pressure transducers with a 4-20 mA output.
4-20 mA pressure transducers have a maximum measurement range and the transducer
will output 4 mA at zero pressure and proportionally increase to 20 mA at maximum
pressure. Proper transducer wiring is key to running the iQpump in “Auto” regulating mode.
Will the iQpump Run Without a Transducer?
The drive will display Feedback Loss (iQpump1000) or Fdb-L (iQpumpMicro) with a
blinking “ALM” indicator as shown in Figure 1, if the drive is powered up without a
transducer connected. This is normal operation until transducer wiring to the A2 terminal is
complete.
TN.iQp.03 ©2015 - Yaskawa America, Inc.
Revision 1 July 8, 2015 Page 1 of 5
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TN.iQp.03
Revisio
2015 - Yaskawa
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Ju
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Page
of 5
Technical Tip: How to Connect and Troubleshoot Transducer Feedback
Product(s): iQpump1000 and iQpump Micro Drives Doc. No. TN.iQp.03
Figure 2: iQpump Micro 2 and 3-Wire Transducer Connections
Figure 3: iQpump1000 2 and 3-Wire Transducer Connections
TN.iQp.03 ©2015 - Yaskawa America, Inc.
Revision 1 July 8, 2015 Page 3 of 5
Technical Tip: How to Connect and Troubleshoot Transducer Feedback
Product(s): iQpump1000 and iQpump Micro Drives Doc. No. TN.iQp.03
External power supply and multi-drive wiring diagrams can be found in section 3.8 of the
iQpump1000 Quick Start Guide for alternate wiring topologies.
Note: Steps 2~5 are factory set by default for a 4-20 mA transducer wired to terminal A2
2. Voltage/Current Selection: Verify the proper setting of switches and jumpers on each
drive:
a. iQpump Micro terminal board DIP Switch S1 should be in the ‘I’ position for
current feedback transducers or ‘V’ position for voltage feedback transducers
(see Figure 4).
b. iQpump1000: Jumper S1 position A2. Jumper S1-A2 should be in the ‘I’ position
for current feedback transducers or ‘V’ position for voltage feedback transducers
(see Figure 4).
Figure 4: Terminal A2 Voltage/Current Selection
iQpump Micro iQpump1000
TN.iQp.03 ©2015 - Yaskawa America, Inc.
Revision 1 July 8, 2015 Page 4 of 5
Technical Tip: How to Connect and Troubleshoot Transducer Feedback
Product(s): iQpump1000 and iQpump Micro Drives Doc. No. TN.iQp.03
3. Verify the parameter H3-09 Terminal A2 Signal Level Selection is properly set according
to the signal type. Typically 2 for current feedback devices or 0 for voltage feedback
devices.
No. Name Description Values
H3-09 Terminal A2 Signal
Level Selection
0: 0 to 10 V
1: -10 to 10 V
2: 4 to 20 mA
3: 0 to 20 mA
Default: 2
Range: 0 to 3
4. Verify the proper Terminal A2 Function Selection (H3-10), typically ‘B’ for PID Feedback.
If terminal A2 is not chosen as the primary transducer feedback input, H3-10 Terminal A2
Function Selection must be disabled and terminal A1 or A3 must be configured for the
appropriate settings following steps 1-4.
How to Wire Multiple Transducers or use an External Transducer Power Supply
1. External power supply and multi-drive transducer wiring diagrams can be found in:
a. iQpump1000: Section 3.8 of the iQpump1000 Quick Start Guide
TOEPYAIP1W01.
Contact Yaskawa America, Inc. technical support at 800-YASKAWA (927-5292) if you have
any other questions regarding the Transducer Feedback Loss feature.
Table of Related Parameters
No. Name Description Values
H3-09 Terminal A2 Signal
Level Selection
H3-10 Terminal A2
Function
Selection
1: -10 to 10 V
2: 4 to 20 mA
3: 0 to 20 mA
Note: Use Jumper S1 to set input terminal A2 for a
current or voltage input signal.
Sets the function of terminal A2. Default: B
Default: 2
Range: 0 to 3
Range: 0 to 32
TN.iQp.03 ©2015 - Yaskawa America, Inc.
Revision 1 July 8, 2015 Page 5 of 5
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