Sanken SVCO6, Instruction Manual, Page: 110 / 326

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7-3 Description of Functions
The inverter converts the input command of each channel into a frequency by adjusting the bias and gain code.
The results are added or subtracted according to the value of F1002.
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A negative result is always regarded as 0. The upper limit of the calculation result is determined using the upper
frequency limit (F1007, F1316 and F1317).
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F1002 = 21: Terminal block stepping function.
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This function allows the target frequency to be increased or decreased under ON/OFF status control of the external
control terminals. This function is useful when it is difficult to input an external analog frequency or to set a
frequency from the operation panel.
1) Related function codes and multifunctional input terminals
Function code Inverter control terminal
F1002=21 AD2 Up terminal
AD3 Down terminal
DCM1 Digital signal common terminal
DCM2 Digital signal common terminal
· If the first speed frequency selection is set to terminal block stepping (F1002= 21), a frequency setting value
can be entered only from external control input terminals AD2 and AD3 of the inverter host.
Note: The frequency cannot be changed from the operation panel.
· It is a function which takes AD2 terminal as the Up terminal of the set frequency and AD3 terminal the
Down terminal of the set frequency.
Note: When F1002=21 is selected, the AD2 and AD3 terminals set using F1414-F1421 can not be used for the 2nd,
3rd, or 4th acceleration/deceleration command.
2) Increasing or decreasing the set frequency
· Increasing the set frequency
Short-circuit the inverter‘s external control terminal AD2 to the DCM1 or DCM2 terminal. The set
frequency increases gradually from the current value.
· Decreasing the set frequency
Short-circuit the inverter‘s external control terminal AD3 to the DCM1 or DCM2 terminal. The set
frequency decreases gradually from the current value.
· Change of frequency display becomes rapid gradually from a low value.
Steady status
Increasing
Steady status
Increasing Decreasing
Steady status
Increasing
Time
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