Raising And Lowering Frequency References Using Digital Signals (Up/Down Function); Timing Chart - Omron VARISPEED F7 User Manual

Timing Chart

The timing chart when using Acceleration/Deceleration Ramp Hold commands is shown in
Power supply
Forward/Stop
Acceleration/Deceleration
Ramp Hold
Frequency reference
Output frequency
Raising and Lowering Frequency References Using Digital Signals
(UP/DOWN Function)
Using the UP and DOWN commands the frequency references can be raised or lowered by switching a pair of
digital inputs.
To use this function, set two of the multi-function digital inputsto UP command and DOWN command (H1-
=10 and H1- =11). The UP and DOWN command need to be programmed to digital inputs simulta-
neously, if only one of both is programmed an OPE03 alarm will occur.
The table below shows the possible combinations of the UP and DOWN commands and the corresponding
operation.
Operation
UP command
DOWN command
The change of the output frequency depends on the acceleration and deceleration times. Be sure to set b1-02
(Run command selection) to 1 (Control circuit terminal).
Multi-function Digital Inputs (H1-01 to H1-05)
Set Value
10 UP command
11 DOWN command
Precautions
Setting Precautions
If multi-function input terminals S3 to S7 are set as follows, an OPE3 alarm will occur:
Only either the UP command or DOWN command has been set.
•
UP/DOWN commands and Acceleration/Deceleration Ramp Hold have been allocated at the same time.
•
OFF ON
OFF ON OFF
Hold
Fig 6.68 Acceleration/Deceleration Ramp Hold
Acceleration Deceleration
ON OFF
OFF
Function
OFF
OFF ON
ON
Hold
Hold
ON OFF
ON ON OFF
V/f
Yes
Yes
Fig 6.68.
Control Methods
V/f Open Closed
with Loop Loop
PG Vector Vector
Yes Yes Yes
Yes Yes Yes
6-
6
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