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program by reading D1028, then it doesn’t work for frequency command anymore. In
that case, the PLC program needs to include functionality to let the AVI input also
function for frequency command.
Q How to save variables in the PLC at power off?
A The VFD-E PLC cannot save variables when it is power off. However, by writing the
variable to an unused parameter, e.g. the Preset Speeds, it can be done.
Writing Constant K1 to Pr05.14:
Reading Pr05.14 and move to register D20:
Q How to set a 0.01Hz frequency step for the UP/DOWN mode?
A You can set Pr02-07=3, then each time the up/down input is activated, the change is
acc. to Pr02-08, so each step is from 0.01Hz to 10Hz. Since the output frequency
display has only resolution of 0.1Hz, you need 10 steps to notice a change on the
display.
You can set Pr02-07=2. Then the rate of change of the output frequency is acc. to
Pr02-08, so from 0.01Hz/ms to 10.00Hz/ms.
Of course, you need to set Pr02-00=0 for UP/DOWN operation.
Q How to read the PID feedback value via serial communication?
A Set Pr00.04=5 (PID feedback value 0-100%) At address 2116H you can read this
value. In general: At address 2116H you can read the value as selected by Pr00.04.
Q Why does Pr00.04=6 show strange behaviour?
A Pr00.04=6 shows the power factor angle in ° (degrees) and not cosphi !
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