All frequency converters are equipped with an RS 485 port as standard, which makes it possible to choose
between two protocols. The two protocols that can be selected in parameter 512
Telegram Profile
, are:
•
Profidrive protocol
•
RS485 FC protocol
To select RS485 FC protocol, parameter 512
Telegram Profile
is set to
FC protocol
[1].
Control and response telegrams
Telegram traffic in a master-slave SYSTEM is controlled by the master. A maximum of 31 slaves can be con-
nected to a master, unless repeaters are used. If repeaters are used, a maximum of 126 slaves can be connected
to a master.
The master constantly sends telegrams addressed to the slaves and waits for response telegrams from them.
The slave's response time is a maximum of 50 ms.
Only a slave that has received an error-free telegram, addressed to that slave can send a response telegram.
Broadcast
A master can send the same telegram simultaneously to all slaves connected to the bus. During this broadcast
communication the slave does not send any response telegrams back to the master as to whether the telegram
has been correctly received. Broadcast communication is set up in address format (ADR), see
Telegram struc-
ture
.
Content of a character (byte)
Each character transferred begins with a start bit.
Then 8 data bits are transferred, corresponding to a
byte. Each character is secured via a parity bit, which
is set at "1" when it reaches parity (i.e. when there is
an equal number of 1's in the 8 data bits and the parity
bit in total). A character is completed by a stop bit,
thus consisting of 11 bits in all.
54
TR1
2800
Series
VFD
Serial Communication for TR1 2800 Series VFD
Protocols
Telegram Traffic
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...