The serial communication reference is transferred to the frequency converter as a 16-bit word. The value is
transferred in whole numbers 0 -
±
32767 (
±
200%).
16384 (4000 Hex) corresponds to 100%.
The serial communication reference has the following format: 0-16384 (4000 Hex)
≅
0-100% (Par. 204
Minimum
ref.
- Par. 205
Maximum ref.
).
It is possible to change the direction of rotation via the serial reference. This is done by converting the binary
reference value to 2' complement. See example.
Example - Control word and serial communication
ref.:
The frequency converter is to receive a start com-
mand and the reference is to be set to 50% (2000 Hex)
of the reference range.
Control word = 047F Hex
⇒
Start command.
Reference = 2000 Hex
⇒
50% reference.
The frequency converter is to receive a start com-
mand and the reference is to be set to -50% (-2000
Hex) of the reference range.
The reference value is first converted to 1' comple-
ment, and then 1 is added binarily to obtain 2' com-
plement:
2000 Hex
0010 0000 0000 0000 0000
1' complement
1101 1111 1111 1111 1111
+ 1
2' complement
1110 0000 0000 0000 0000
Control word = 047F Hex
⇒
Start command.
Reference = E000 Hex
⇒
-50% reference.
TR1
2800
Series
VFD
69
Serial Communication Reference
Programming
Содержание VarioTrane TR1 2800 Series
Страница 2: ...T TR R1 1 2 28 80 00 0 S Se er ri ie es s V VF FD D 1 1...
Страница 3: ...2 2 T TR R1 1 2 28 80 00 0 S Se er ri ie es s V VF FD D...
Страница 4: ...TR1 2800 Series VFD 3...
Страница 7: ...6 TR1 2800 Series VFD...
Страница 87: ...Illustration 5 7 192H4719 Illustration 5 8 192H4720 86 TR1 2800 Series VFD...
Страница 95: ...Branch Circuit Protection Short circuit protection 94 TR1 2800 Series VFD...
Страница 107: ...All about TR1 2800 Series VFD 106 TR1 2800 Series VFD...