Yaskawa iQpump Controller Programming Manual Manuel d'utilisateur télécharger pdf (Page 171)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 171

Figure 1.124

Figure 128. Anti-No-Flow - Leaks / Very Low Flow

Table 69 Parameters

Table 70 Monitors

<0034>

◆ P2-24 Anti-No Flow Detection Time <0034>

Setting Range: 1.0 ~ 60.0 s

Factory Default: 10.0 s

Refer to parameter P2-24 in Appendix A for description details.

◆ P2-25 Anti-No Flow Release Level <0034>

Setting Range: 1.0 ~ 100.0 psi

Factory Default: 3.0 psi

Refer to parameter P2-25 in Appendix A for description details.

Parameter

No.

Addr.

Hex

Parameter Name

Digital Operator Display

Description Range Default

Location

P2-23



822

Anti-No-Flow Bandwidth

ANF Bandwidth

Sets the amount of PI “Error” bandwidth used to detect the No-Flow

condition.

Operation can become less stable if this value is set too high. A

setting of 0.000% disables this feature.

0.00 ~

2.00%

0.40% Programming

P2-24

 823

Anti-No-Flow Detection Time

ANF Det Time

Sets the time delay after No-Flow is detected before the drive starts

its increased deceleration rate.

1.0 ~

60.0 s

10.0 s Programming

P2-25



<0034>

824

Anti-No-Flow Release Level

ANF Release Lvl

Once the Anti-No-Flow activates (after the P2-24 time), the feedback

must drop this amount below the setpoint for the Anti-No-Flow to

disengage and return to normal PI operation.

0.0 ~

100.0 psi

3.0 psi Programming

 Denotes that parameter can be changed when the drive is running.

Monitor

No.

Addr.

Hex

Monitor Name

Digital Operator Display

Description

U1-99 72D

Anti-No-Flow Timer

ANF Timer

When this value reaches the P2-24 setting, the Anti-No-Flow feature begins to reduce the output frequency.

Feedback

Output

Frequency

P2-24

ANF Det Time

Setpoint

Drive

(re)Start

P2-02

Sleep Level

ANF Release Lvl

P2-25

Start Level

P2-24

ANF Det Time

P2-03

Sleep Tm.

Min Speed or

Thrust Speed

Feedback above

setpoint

Feedback drops below P2-25 ANF Release Level.

Anti-no-flow dis-engages, normal operation resumes

Anti-No-Flow – Leaks / Very Low Flow

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Yaskawa iQpump Controller Programming Manual Manuel d'utilisateur Page 171

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