Sometimes tap position indication is done by using multiple digital inputs. With binary coded inputs any
one decimal numeral can be represented by a five-bit pattern. You can use binary input code by setting
the "Tap position indication" to "Binary coded inputs" at the Tap settings. The digital inputs are then
defined in the regulator's menu at
Control
→
Control functions
→
Voltage regulator
→
IO
→
Input
signal control. Up to five digital inputs can be set for binary input coding, and up to 31 positions can be
indicated with binary coding (see the image below).
BCD-coded digital inputs
Just like binary coded input position indication, "Binary coded decimal" (BCD) position indication also
uses multiple digital inputs. But they are not interchangeable. Difference between the two is the
numbering format. Whereas binary coded mode 4-bit hexadecimal number is valid up to
F
16
representing binary 1111
2
(decimal 15), BCD numbers stop at decimal 9 (1001
2
in binary).
Because of this decimal 10 is 1 0000
2
in binary. You can use BCD inputs by setting the "Tap position
indication" to "BCD-coded inputs" at the Tap settings. The digital inputs are then defined in the
regulator's menu at
Control
→
Control functions
→
Voltage regulator
→
IO
→
Input signal control. Up
to five digital inputs can be set for BCD coding, and up to 18 positions can be indicated with BCD
coding (see the image below).
A
AQ
Q-T215
-T215
Instruction manual
Version: 2.04
268
