Lenze DDS Target 9300 Servo PLC V8.x Bedienungsanleitung PDF herunterladen (Seite 88)

2.12 MCTRL_MotorControl (node number 131)

9300 Servo PLC

System blocks

2−82

9300 Servo PLC EN 5.1

2.12.17.6 LU − undervoltage monitoring

This function monitors the DC bus and protects the controller.

Error

Monitoring function System variable

Possible responses

No. Display TRIP Message Warning FAIL−QSP Off

x030 LU Undervoltage MCTRL_bUndervoltage_b 

 Lenze setting

 Setting possible

The monitoring responds if the DC−bus voltage at the terminals +U

and −U

falls below a switch−off

threshold dependent on C0173 and it remains active until the corresponding switch−on threshold has

again been exceeded.

 The DC−bus voltage is set under C0173 (^ 2−80).

 The switch−off and switch−on thresholds dependent on C0173 can be gathered from the

following table:

Setting of C0173 Switch−off threshold Switch−on threshold

0 Mains < 400 V; with or without brake unit 285 V 430 V

1 Mains = 400 V; with or without brake unit 285 V 430 V

2 Mains = 460 V; with or without brake unit 328 V 473 V

3 Mains = 480 V; without brake unit 342 V 487 V

4 Mains = 480 V; with brake unit 342 V 487 V

 The switch−off threshold defines the voltage level of the DC−bus voltage, at which the pulse

inhibit is activated.

Tip!

If the undervoltage lasts longer than 3 s or if the drive is powered up, this is entered into the fault

memory.

 This can be the case if the control module is supplied externally via the terminals X5/39 and

X5/59 and the mains is switched off.

 If the undervoltage has been eliminated (reconnection to the mains), the entry is not updated

in the fault memory but deleted because this is not an error but a controller status.

Undervoltages which last for less than 3 s are interpreted as a fault (e.g. power system fault) and

entered into the fault memory. In this case the fault memory is updated.

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Lenze DDS Target 9300 Servo PLC V8.x Bedienungsanleitung Seite 88