Leroy-Somer FMV 2107, Руководство по установке и обслуживанию

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3.7 - Connection of the serial link
3.7.1 - General
The protocol used is ANSI x 3.28.2.5 A4.
This serial link can be set up using RS 485 and RS 422
standards which provide differential data transmission
and reception using 5-wire cable.
As the output on most PCs is RS 232 standard, an
RS 232/RS 422 or RS 232/RS 485 interface must be
added as close as possible to the PC.
Caution :
Since the inverter serial link is not isolated, it is important
that the user takes all the necessary precautions to
prevent damage which may be caused by a PC or
inverter failure (isolator for example).
3.7.2 - Standard RS 485/RS 422 connection
• RS 485 : 2 pairs of twisted shielded wires + 0V wire,
- characteristic impedance = 120
Ω
,
- impedance matching resistance = 120
Ω
between
terminals B3 and B4,
- maximum cable length = 1200 m.
• RS 422 : 2 pairs of twisted shielded wires + 0V wire,
- characteristic impedance = 100
Ω
,
- impedance matching resistance = 100
Ω
between
terminals B3 and B4,
- maximum cable length = 1200 m.
Note : With the RS 485 standard, it is possible to
communicate with up to 32 inverters connected on the
same line from a single PC (or PLC). Each inverter has a
unique serial address.
RS 485 serial link with 32 inverters per port
* Impedance matching resistances are installed on the
furthest inverter, directly between terminals B3 and B4.
3.7.3 - Configuration of the FMV 2107 and FMV 2307
• Program :
- P09 : serial address,
- b12 : Baud rate selector,
• Wire :
- terminal C7, external trip (at 0V),
from this moment the inverter parameters can be
accessed in read,
- terminal C11, remote control (at 0V).
• Access level :
- if b6 = 0 : read only parameters,
- if b6 = 1 and remote control : read and write
parameters,
- b9 = 1 : control via the terminal block.
Note : The serial link is even parity only.
23
Frequency inverters
FMV 2107
FMV 2307
B3 B4 B5 B6 B7
Transmitter
differential
twisted wires
Receiver
differential
twisted wires
RX RX TX TX
Reception
Isolator
Transmission
0V
0V
30 31 32
R T R T R T
Port A Port B
PC
R
R T
33 34
T R T R R
R T
FMV
30
FMV
31
FMV
32
FMV
33
FMV
34
Serial
address
unique to
inverter
(P9)
Isolator
R : receiver input
T : transmitter output
* *