Danfoss VLT User Manual

Par. No. # Parameter description Default value
(SR = Size related)
4 set-up Change during oper-
ation
Conver-
sion index
Type
25-0* System Settings 25-00 Cascade Controller [0] Disabled 2 set-ups FALSE - Uint8 25-02 Motor Start [0] Direct on Line 2 set-ups FALSE - Uint8
25-04 Pump Cycling [0] Disabled All set-ups TRUE - Uint8
25-05 Fixed Lead Pump [1] Yes 2 set-ups FALSE - Uint8
25-06 Number Of Pumps 2 N/A 2 set-ups FALSE 0 Uint8
25-2* Bandwidth Settings 25-20 Staging Bandwidth 10 % All set-ups TRUE 0 Uint8 25-21 Override Bandwidth 100 % All set-ups TRUE 0 Uint8
25-22 Fixed Speed Bandwidth casco_staging_bandwidth (P2520) All set-ups TRUE 0 Uint8
25-23 SBW Staging Delay 15 s All set-ups TRUE 0 Uint16
25-24 SBW De-staging Delay 15 s All set-ups TRUE 0 Uint16
25-25 OBW Time 10 s All set-ups TRUE 0 Uint16
25-26 Destage At No-Flow [0] Disabled All set-ups TRUE - Uint8
25-27 Stage Function [1] Enabled All set-ups TRUE - Uint8
25-28 Stage Function Time 15 s All set-ups TRUE 0 Uint16
25-29 Destage Function [1] Enabled All set-ups TRUE - Uint8
25-30
Destage Function Time 15 s All set-ups TRUE 0 Uint16
25-4* Staging Settings 25-40 Ramp-down Delay 10.0 s All set-ups TRUE -1 Uint16 25-41 Ramp-up Delay 2.0 s All set-ups TRUE -1 Uint16
25-42 Staging Threshold ExpressionLimit All set-ups TRUE 0 Uint8
25-43 De-staging Threshold ExpressionLimit All set-ups TRUE 0 Uint8
25-44 Staging Speed [RPM] 0 RPM All set-ups TRUE 67 Uint16
25-45 Staging Speed [Hz] 0.0 Hz All set-ups TRUE -1 Uint16
25-46 De-staging Speed [RPM] 0 RPM All set-ups TRUE 67 Uint16
25-47 De-staging Speed [Hz] 0.0 Hz All set-ups TRUE -1 Uint16 25-5* Alternation Settings 25-50 Lead Pump Alternation [0] OFF All set-ups TRUE - Uint8 25-51 Alternation Event [0] External All set-ups TRUE - Uint8 25-52 Alternation Time Interval 24 h All set-ups TRUE 74 Uint16
25-53 Alternation Timer Value 0 N/A All set-ups TRUE 0 VisStr[7]
25-54 Alternation Predefined Time ExpressionLimit All set-ups TRUE 0
TimeOfDay-
WoDate
25-55 Alternate if Load < 50% [1] Enabled All set-ups TRUE - Uint8
25-56 Staging Mode at Alternation [0] Slow All set-ups TRUE - Uint8
25-58 Run Next Pump Delay 0.1 s All set-ups TRUE -1 Uint16
25-59 Run-on Line Delay 0.5 s All set-ups TRUE -1 Uint16
6.2.23 25-** Cascade Controller
6 How to program the adjustable frequency
drive
VLT
®
HVAC Drive Instruction Manual
6-84 MG.11.A9.22 - VLT
®
is a registered Danfoss trademark
6

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)