5.4 Reference Handling
5.4.1 Bus Speed Reference Value
0% = 0hex
100% = 4000hex
-100% = C000hex
Depending of the setting of 3-00 Reference Range, the reference is scaled from – Max. to + Max. or from Min. to Max.
Reverse Forward
Par.3-00 set to
(1) -max- +max
Max reference Max reference
Par.3-00 set to
(0) min-max
Max reference
Forward
Min reference
100%
(4000hex)
-100%
(C000hex)
0%
(0hex)
Par.3-03 0 Par.3-03
Par.3-03
(4000hex)(0hex)
0% 100%
Par.3-02
130BA277.10
The actual reference [Ref. %] in the frequency converter depends on the settings in the following parameters:
1-23 Motor Frequency
1-25 Motor Nominal Speed
3-02 Minimum Reference
3-03 Maximum Reference
All references provided to the frequency converter are added to the total reference value. If a reference is to be controlled
by thefieldbus only, ensure that all other reference inputs are zero.
This means that digital and analogue input terminals should not be used for reference signals. The default setting (0%)
should be maintained for preset references in 3-10 Preset Reference.
CAUTION
If the bus speed reference is negative, and the control word contains a run reverse signal, the frequency converter will run
clockwise (- - is +).
MAV is scaled in the same way as the reference.
How to Control MCA 121 EtherNet/IP
26 MG.90.J3.02 - VLT
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