Special Vfd Parameter Settings For Dmx - Grundfos DMX 221 Installations- Und Bedienungsanleitung

11.2.4 Special VFD parameter settings for DMX

• Some parameters have been adapted to DMX pumps. These parameters differ from the de-
fault settings mentioned in the supplier manual for the VFD.
• Do not change the special parameter settings of the VFD for operation with DMX pumps.
• When resetting the VFD to default settings, the special parameter settings for DMX will be
overwritten. The special parameters must be set again.
Mandatory settings
• Do not set P506, "automatic fault acknowledgement", to 6, "always". In case of an active er-
ror, such as leakage to earth or short circuit, the VFD will restart continuously and cause
damage to the system because P428 is set to 1, "on".
• Do not change the following settings as this may lead to malfunction of the DMX pump with
VFD.
Basic parameters
Code Parameter
P102 Startup time
P105 Maximum frequency
Control terminals
Code Index Parameter
P400 -02 Setpoint input function. Analog input 2 (AIN 2)
P401 -01 Analog mode ON. Analog input 1 (AIN 1)
P401 -02 Analog mode ON. AIN 2
P402 -01 Adjustment: 0 %. AIN 1
P402 -02 Adjustment: 0 %. AIN 2
P403 -02 Adjustment: 100 %. AIN 2
P420 -01 Digital input function. Digital input 1 (DIN 1)
P420 -02 Digital input function. Digital input 2 (DIN 2)
P420 -03 Digital input function. Digital input 3 (DIN 3)
P428 Automatic starting after power supply has been
switched OFF
*1 The minimum frequency for the VFD is set to approx. 5 Hz.
Extra functions
Code Parameter
P504 Pulse frequency
P540 Mode phase sequence
Modifications of other parameters and adaptation of the inputs and outputs can be made by
means of the optional "parameter box" or the "NordCon" software. Read the supplier manual "BU
0180" for the VFD provided with the product.
Value for DMX
8 kHz
3 = only counter-clockwise (CCW) direction of rotation.
DMX 221 | | 60
Value for DMX
5 s
100 Hz
Value for DMX
01 = Setpoint frequency
2 = 0-10 V, monitored
2 = 0-10 V, monitored
*1
1.36 V
1 V
5 V
02 = Enable left (left-handed
rotation)
19 = Setpoint 1 on/off
20 = Setpoint 2 on/off
1 = On (enable with level)