Danfoss VACON 100 FLOW Series Application Manual page 264

VACON® 100 FLOW
Application Guide
A Mains
B Motor 1 control from relay
11.17.4.3 (ID 1029) Autochange Interval
Location in the menu: P3.15.8
Use this parameter to adjust the autochange intervals. The Autochange interval is the time after which the autochange function
starts if the used capacity is below the set level. The value of this timer does not run when the Multi-pump system is stopped or in
the sleep mode. To use the parameter, select Enabled (interval) with parameter P3.15.6 Autochange Mode.
The autochange occurs, if:
• the Multi-pump system operates (the start command is active)
• the autochange interval time goes
• the pump that controls the system operates below the frequency specified by parameter P3.15.11 Autochange Frequency Limit
• the number of pumps that operate is less or equal to the limit specified by parameter P3.15.12 Autochange Pump Limit.
11.17.4.4 (ID 1786) Autochange Days
Location in the menu: P3.15.9
Use this parameter to set the days of the week when the autochange function starts. The value of this parameter is applied if the
autochange mode is 'Enabled (Weekdays)'.
11.17.4.5 (ID 1787) Autochange Time of Day
Location in the menu: P3.15.10
Use this parameter to set the time of the day when the autochange function starts. The value of this parameter is applied if the
autochange mode is Enabled (Weekdays). To use the parameters, select Enabled (Weekdays) with parameter P3.15.6 Autochange.
The autochange occurs, if:
• the Multi-pump system operates (the start command is active)
• it is the autochange weekday and the time of day
• the pump that controls the system operates below the frequency specified by parameter P3.15.11 Autochange Frequency Limit
• the number of pumps that operate is less or equal to the limit specified by parameter P3.15.12 Autochange Pump Limit.
11.17.4.6 (ID 1031) Autochange Frequency Limit
Location in the menu: P3.15.11
Use this parameter to set the autochange frequency limit. The autochange frequency limit is the limit below which the output fre-
quency of the regulating drive must stay for the autochange to start.
11.17.4.7 (ID 1030) Autochange Pump Limit
Location in the menu: P3.15.12
Use this parameter to set the amount of pumps used in the Multi-pump function. The Autochange Pump Limit is the limit below
which the number of the running motors must stay for the autochange to start.
If the number of pumps that operate in the Multi-pump system is less or equal to the limit specified by parameter P3.15.12 and the
pump that controls the system operates below the frequency specified by parameter P3.15.11, the autochange can occur.
These parameters are used in the Single drive mode, because the autochange can restart the system (depending on the quantity of
motors that operate).
In the Multifollower and Multimaster modes, set these parameters to the maximum values to make it possible for the autochange to
occur immediately at the autochange time. In the Multifollower and Multimaster modes, the quantity of pumps that operate does
not affect the autochange.
11.17.4.8 (ID 1097) Bandwidth
Location in the menu: P3.15.13
Use this parameter to set the bandwidth area around the PID setpoint for starting and stopping of the auxiliary motors. When the
PID feedback value stays in the bandwidth area, the auxiliary motors do not start or stop. The value of this parameter is given as a
percentage of the setpoint.
264 | Danfoss A/S © 2023.08
C Motor 2 control from relay
D Motor 3 control from relay
AB298035655957en-000201 / DPD01083
Parameter Descriptions