Danfoss VLT Flow Drive FC 111 Programming Manual page 174

VLT® Flow Drive FC 111
Programming Guide
Do not set parameter 14-20 Reset Mode to [13] Infinite auto reset, when parameter 22-60 Broken Belt Function is set to [2] Trip. Doing
so causes the drive to continuously cycle between running and stopping when a broken-belt condition is detected.
If the automatic bypass function is enabled, the bypass starts when the drive experiences a persistent alarm condition. In this
case, disable the automatic bypass function if [2] Trip is selected as the broken-belt function.
Table 406: Option:
[0] Off This function is not active.
[1] Warning
The drive continues to run, but activates a broken-belt warning (warning 95, Broken Belt). A drive digital output or
a serial communication bus can communicate the warning to other equipment.
[2] Trip The drive stops running and activates a broken-belt alarm (alarm 95, Broken Belt). A drive digital output or a serial
communication bus can communicate the alarm to other equipment.
22-61 Broken Belt Torque
Default value: 10%
Conversion index: 0
Set the broken-belt torque as a percentage of the rated motor torque.
Table 407: Range:
Min: 5%
22-62 Broken Belt Delay
Default value: 10 s
Conversion index: 0
Set the time for which the broken-belt conditions must be active before carrying out the action selected in parameter 22-60 Broken
Belt Function.
Table 408: Range:
Min: 0 s
4.16.7 22-8* Flow Compensation
In certain applications, it is not possible for a pressure transducer to be placed at a remote point in the system, and it can only be
placed close to the fan/pump outlet. Flow compensation operates by adjusting the setpoint according to the output frequency,
which is almost proportional to flow. Thus, it compensates for higher losses at higher flow rates.
H (required pressure) is the setpoint for closed-loop (PI) operation of the drive and is set as for closed-loop operation without
DESIGN
flow compensation.
174 | Danfoss A/S © 2021.07
N O T I C E
N O T I C E
Parameter type: Range
Data type: u_int8
Max: 100%
Parameter type: Range
Data type: u_int16
Max: 600 s
2-setup: All setups
Change during operation: True
Default value: 10%
2-setup: All setups
Change during operation: True
Default value: 10 s
AU363928304090en-000101 / 130R0982
Parameters