Using The Digital Umc Inputs; Using The Inputs Di3-Di5; Using The Multifunction Inputs Di0-Di2 - ABB UMC100.3 Manual

C O N F I G U R I N G T H E M OTO R M A N A G E M E N T F U N C T I O N S
The UMC can be parameterised to monitor that the motor was really started using a checkback signal. By default the actual motor
current is monitored. But it is also possible to use an auxiliary contact mounted on the main contactor.
If checkback monitoring via motor current is active it is checked that the measured current rose above
Checkback Delay Time (t
cbd
that the motor current is zero at the latest after the Checkback Delay Time.
For checkback via contactors one or more auxiliary contacts must be installed and wired to the UMC's digital input DI0.
The number of monitored signals depends on the selected control functions which are described in the following sections.
Stop
=================================\--------/=====================
Start
----/=======\-----------------------------------------/=========
t
Check-
cbd
back
------/==============================\------------------------/=
Check-
------------------------------------------------------------/===
back
Fault
Related Parameters
• Checkback Time
• Checkback Mode

Using the Digital UMC Inputs

The UMC inputs DI0 ... DI5 are digital inputs according to IEC61131. They can be used to connect status and control signals to the
UMC. UMC's reaction to these signals can be adapted in a wide range to cover typical user needs (e.g. starting the motor). The sta-
tus of each digital input is available in the monitoring telegram sent to the PLC/DCS.

Using the Inputs DI3-DI5

The inputs DI3 to DI5 can be used for local motor control. DI5 is always the stop input whereas DI4 starts the motor in a forward
direction and DI3 in a reverse direction (if supported by the active control function).
If inching mode is enabled the stop can still be used.

Using the Multifunction Inputs DI0-DI2

The digital inputs DI0, DI1 and DI2 are called multifunction inputs because their function can be adapted flexibly depending to your
application requirements. The following diagram shows the way the multifunction inputs work.
The three multifunction inputs operate fully independent - i.e. for each input an own delay time and function can be selected. Func-
tions like 'test position', 'stop motor' etc. internally pass an OR gate so the UMC does not differentiate from which digital input the
signal came.
If an input is configured as fault input the behaviour is different. For each input its own internal error signal is available and a fault
text can be specified which is displayed on the LCD panel in the event of this error.
You can thus find out what input actually triggered the fault. Faults can be auto acknowledged when the fault has been rectified.
The unchanged signal from the DI is always available for monitoring purposes (Input 1/2/3 status).
Typical usage of a multifunction input is to trigger a trip or warning because of an external signal, signal test position of a drawer
or read the status of the CEM ground fault detection device.
For a full list of options see section "Parameters and Data Structures".
) after switching on the main contactor. Otherwise when the motor is switched off the function checks
t
t
cbd
cbd
20 % within the
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