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Control Function Softstarter
Use this function to control a softstarter. The UMC acts as communication interface for the softstarter.
The following protection functions are not active during ramp-up and ramp-down:
• Frequency out of range
• Unbalance
• Phaseloss
• Internally calculated ground fault
During ramp-up and ramp-down and a connected voltage module the power and cos-phi values are invalid.
The control function softstarter must not be used for ATEX applications.
• Check-back supervision must be set to "Current"
• Relay output DO0 is used by the control function to activate the forward contactor
• Relay output DO1 is used from the control function to activate the reverse contactor
• Relay output DO2 provides the start/stop signal for the softstarter
• DI0 is used as ramping information for the UMC in case a Softstarters provides this signal (see below)
Set multifunction input DI0 to “Off”. It must not be configured for any other function in this case.
• Optionally DI3 / DI4 can be used to start the motor and DI5 to stop the motor
• Optionally DO3 can be used as a fault output
For softstarters without by-pass signal
it is necessary to configure a ramp-up time. After this time the UMC assumes the ramp-up
to be finished and protection functions listed in the box above are activated again. To configure the ramp-up time use the YD-Star-
ting-Time parameter. A value < 3600 seconds must be set. After the start command the UMC immediately closes the main contac-
tor but awaits an additional delay (paramter Delay1) till the start command is signalled to the softstarter.
Stopping: After the stop signal the UMC immediately opens DO2 to signal the stop to the softstarter. The UMC detects the end of
the ramp-down phase automatically by monitoring the motor current (I < below lower measurement range).
Check back supervison must be set to "Motor current" for that reason. After ramp-down was detected an additional delay (para-
meter Delay2) is awaited until the forward or reverse contactor is opened.
Checkback delay time has to be configured equal or larger than the time configured for Delay 1 or Delay 2. Delay 1 and delay 2 are
predefined but can be changed using the custom application editor.
Softstarters providing a ramping signal
it is recommended to use this signal and connect it to digital input DI0 of the UMC. The
Multifunction Input 0 must be set to Off in this case.
The parameter YD-Starting-Time must be set to 3600 seconds in this case.
—
Monitoring Data for Softstarter
Word
Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit1
Bit 0
0
0
Summary
Warning
Summary
Fault
Local Control Reverse
Lockout
Time
Overload
warning
Run
Forward
Off
Run
Reverse
1
UMC100 DI5
UMC100 DI4
UMC100 DI3
UMC100 DI2
UMC100 DI1
UMC100 DI0
-
-
1
2, 3
Remaining data see section Parameters and Data Structures on a Fieldbus
2
4, 5
3
6, 7
4
8, 9
5
10.11
6
12
13
7
14
15
The table above represents the data allocation as realised with the built-in standard applications. It may differ for
customer-specific applications!
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