12-11-2013, 01:12 PM
I've just read the manual.
The A1 input is if you want to current control the device, which you are not doing (i.e. leave it n/c) - you are using voltage control via the 10K pot. Frankly, a 5K pot would be fine - its only acting as a potential divider giving 0-10V on the wiper.
Note that this pot should be LINEAR - it sounds like you may be using a LOG pot instead. - I'd get a DVM (NOT an AVO) and measure the voltage on the wiper as you rotate the pot - the measured voltage should be directly proportional to the angle of rotation, e.g. half rotated should be 5V, three-quarters should be 7.5V etc.
The dotted ovoid round the connections is indicating that you should be using a screened multi-core cable to connect the pot, with the screen earthed at the VFD end only. These sorts of inputs are very noise-sensitive - the screening will be important, especially if the wire to the pot is more that a meter or so. If the pot is on a plastic panel or an un-grounded panel, it may help to tack the screen to the pot case. Be careful you aren't creating a ground loop if you do this...
Is this a new or second-hand unit? If used, it may be that some of the system's parameter settings are no longer at their default values. What model do you have, and is it new? A factory settings reset can be done by setting PD013 to "8".
Cheers
The A1 input is if you want to current control the device, which you are not doing (i.e. leave it n/c) - you are using voltage control via the 10K pot. Frankly, a 5K pot would be fine - its only acting as a potential divider giving 0-10V on the wiper.
Note that this pot should be LINEAR - it sounds like you may be using a LOG pot instead. - I'd get a DVM (NOT an AVO) and measure the voltage on the wiper as you rotate the pot - the measured voltage should be directly proportional to the angle of rotation, e.g. half rotated should be 5V, three-quarters should be 7.5V etc.
The dotted ovoid round the connections is indicating that you should be using a screened multi-core cable to connect the pot, with the screen earthed at the VFD end only. These sorts of inputs are very noise-sensitive - the screening will be important, especially if the wire to the pot is more that a meter or so. If the pot is on a plastic panel or an un-grounded panel, it may help to tack the screen to the pot case. Be careful you aren't creating a ground loop if you do this...
Is this a new or second-hand unit? If used, it may be that some of the system's parameter settings are no longer at their default values. What model do you have, and is it new? A factory settings reset can be done by setting PD013 to "8".
Cheers
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