YASKAWA IQpump1000 Instruction Manual

Technical Tip: How to Connect and Troubleshoot Transducer Feedback

Product(s): iQpump1000 and iQpump Micro Drives Doc. No. TN.iQp.03

Revision 1 July 8, 2015 Page 1 of 5

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.

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Technical Tip: How to Connect and Troubleshoot Transducer Feedback

Product(s): iQpump1000 and iQpump Micro Drives Doc. No. TN.iQp.03

Revision 1 July 8, 2015 Page 3 of 5

Figure 2: iQpump Micro 2 and 3-Wire Transducer Connections

Figure 3: iQpump1000 2 and 3-Wire Transducer Connections

Technical Tip: How to Connect and Troubleshoot Transducer Feedback

Product(s): iQpump1000 and iQpump Micro Drives Doc. No. TN.iQp.03

Revision 1 July 8, 2015 Page 4 of 5

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

Technical Tip: How to Connect and Troubleshoot Transducer Feedback

Product(s): iQpump1000 and iQpump Micro Drives Doc. No. TN.iQp.03

Revision 1 July 8, 2015 Page 5 of 5

3. Verify the parameter H3-09 Terminal A2 Signal Level Selection is properly set according

to the signal type. Typically 2for current feedback devices or 0for 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

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.

Default: 2

Range: 0 to 3

H3-10 Terminal A2

Function

Selection

Sets the function of terminal A2. Default: B

Range: 0 to 32

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