Yaskawa iQpump Controller Programming Manual Manuel d'utilisateur télécharger pdf (Page 122)

122 YASKAWA TM.iQp.07 iQpump Controller Programming Manual

L4 Speed Command Loss Detection

◆ L4-01 Speed Agreement Detection Level

Setting Range: 0.0 ~ 200.0 Hz

Factory Default: 0.0 Hz

Refer to parameter L4-01 in Appendix A for description details.

◆ L4-02 Speed Agreement Detection Width

Setting Range: 0.0 ~ 20.0 Hz

Factory Default: 2.0 Hz

Parameters L4-01 and L4-02 are user specified levels for use with the Fref / Fout Agree 1, Fref / Set Agree 1, and Freq Detect 1 and 2

digital output functions. Please refer to the H2 Digital Output Parameters for more information.

◆ L4-05 Frequency Reference Loss Detection Selection

Note: Only available in Hand Mode (P5-01 = 0).

◆ L4-06 Frequency Reference at Loss of Frequency Reference

Setting Range: 0.0 ~ 100% of previous speed command

Factory Default: 80% of previous speed command

The drive can be configured to compensate for the loss of its external speed command. An external speed command is considered lost if

it drops 90% of its value in 400 mS or less.

Figure 1.100

Figure 104. Loss of Frequency Reference Timing Diagram

To enable Frequency loss detection, set L4-05 = “1: Enabled @% of PrevRef”. If Frequency Reference Loss Detection is enabled and the

reference is lost, the drive continues to operate at the speed commanded by parameter L4-06. When the speed command returns, the drive

again follows the speed command.

Setting H2-01 / H2-02 = “C: Loss of Ref”, configures a digital output as a Frequency Reference Loss indication only when L4-05 = “1”

Enabled @ % of PrevRef”.

Note: Only available in Hand Mode (P5-01 = 0).

Setting Description

0Disabled

1 Enabled @ % of PrevRef (factory default)

Frequency

Reference

Output

Frequency

100%

10%

T = 400 mS

L4 - 06

Time

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 301 302

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Yaskawa iQpump Controller Programming Manual Manuel d'utilisateur Page 122