Conversion Of One Only Frequency (Single Or Dual Channel With Direction Signal); Conversion And Combination Of Two Independent Frequencies - Hohner FU 252 Operating Manual

6.1. Conversion of one only frequency
(single channel or dual channel with direction signal)
Make sure that the DIL switches are set according to the encoder you use, and that position 6
of switch DIL1 is OFF (Teach function active).
 Self-test: Upon power up, both front LED's must be lit first, and the yellow status LED must
switch off after the self-test has been concluded successfully (approx.1 s).
 Scaling of the Analog output with use of the Teach function:
Press the Teach button one time. The status LED will blink in a slow sequence while the
unit waits for setting of the minimum frequency. Please make your encoder now generate
the frequency where you expect your Analog output to be zero (in general this will be 0 Hz
at standstill)
 Press the Teach button again. This stores your minimum frequency definition, the LED will
blink in a fast sequence and the unit waits for setting of the maximum frequency. Please
move your encoder now at a speed where you expect full scale Analog output.
 Press the teach button once more. This stores your maximum frequency definition and the
LED will switch off. After this Teach procedure, your Analog output is set to a 0 – 10 volts
range between the minimum and the maximum input frequency.
6.2. Conversion and combination of two independent
frequencies (A + B, A - B, A x B, A : B)
In principle, the Teach procedure is the same as described under 6.1. However, we must first
teach every of the two channels A and B separately.
 Set the DIL switch to "Channel A only" (see 5.1) and teach the minimum and the maximum
frequency for channel A like shown before.
 Now set the DIL switch to "Channel B only" and run the teach procedure for minimum and
maximum frequency of channel B.
 Finally, set the DIL switch according to the combination of the frequencies that you desire.
The unit is able to automatically re-scale the output swing in a way that you receive full
scale output when the result of the A/B calculation reaches the maximum
(see parameter "Teach Mode").
Fu252_02g_oi_e.doc / Apr-16
www.hohner-elektrotechnik.de
Please observe that minimum and maximum frequency settings for
inputs A and B must never be "0" when you intend to use the ratio
function A : B !
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