Frequency Reference
6-5
Using Multi-Step Speed Operation
The MxC can be programmed to change the speed of the motor over a 17-step process, using 16 frequency ref-
erences and one jog frequency reference.
The following example of a multi-function input terminal function shows a 9-step operation using Multi-Step
References 1 to 3 and the Jog Frequency Selection functions.
Related Parameters
To switch frequency references, set Multi-Step Speed References 1 to 3 and the Jog Reference Selection to the
multi-function digital inputs. Setting examples are shown below.
Multi-Function Digital Inputs (H1-01 to H1-10)
Combination of Multi-Function References and Multi-Function Digital Inputs
Change the selected frequency reference by combining the on/off status of S5 to S9 (multi-function digital
input terminals) to set Multi-Step Speed References 1 to 3 and the Jog Frequency Selection. The following
table shows the possible combinations.
* The Jog Frequency Selection for terminal S7 is given priority over the other multi-step speed references.
Terminal
Parameter
Number
Set Value
(Default)
Details
S5 H1-03 3
Multi-Step Speed Reference 1 (Also used for master speed/auxiliary speed switching when
multi-function analog input H3-09 is set to 2 (auxiliary frequency reference)).
S6 H1-04 4 Multi-Step Speed Reference 2
S9 H1-07 5 Multi-Step Speed Reference 3
S7 H1-05 6 Jog Frequency Selection (given priority over multi-step speed reference)
Speed
Terminal S5 Terminal S6 Terminal S9 Terminal S7
Selected Frequency
Multi-Step
Speed
Reference 1
Multi-Step
Speed
Reference 2
Multi-Step
Speed
Reference 3
Jog
Frequency
Selection
1 off off off off Frequency Reference 1 d1-01, Master Speed Frequency
2 on off off off Frequency Reference 2 d1-02, Auxiliary Frequency 1
3 off on off off Frequency Reference 3 d1-03, Auxiliary Frequency 2
4 on on off off Frequency Reference 4 d1-04
5 off off on off Frequency Reference 5 d1-05
6 on off on off Frequency Reference 6 d1-06
7 off on on off Frequency Reference 7 d1-07
8 on on on off Frequency Reference 8 d1-08
9- - -
on
*
Jog Frequency d1-17
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