VLT
®
8000 AQUA
Programming
■
Serial communication 500-556
In this parameter group, the serial communication
of the frequency converter is set up.
In order to use serial communication, address and
baudrate must always be set. In addition, such present
operational data as reference, feedback and motor
temperature can be read via serial communication.
500 Protocol
(PROTOCOL)
Value:
✭
FC protocol (FC PROTOKOL)
[0]
Modbus RTU (MODBUS RTU)
[1]
501 Address
(ADDRESS)
Value:
Parameter 500
Protocol = FC protocol
[0]
0 - 126
✭
1
Parameter 500
Protocol = MODBUS RTU
[1]
✭
1
Function:
In this parameter it is possible to allocate an
address in a serial communication network to
each frequency converter.
Description of choice:
The individual frequency converter must be
given a unique address.
If the number of units connected (frequency converter
+ master) exceeds 31, an amplifier (repeater)
must be used. Parameter 501
Address
cannot
be chosen via serial communication, but must
be set via the LCP control unit.
502 Baudrate
(BAUDRATE)
Value:
300 Baud (300 BAUD)
[0]
600 Baud (600 BAUD)
[1]
1200 Baud (1200 BAUD)
[2]
2400 Baud (2400 BAUD)
[3]
4800 Baud (4800 BAUD)
[4]
✭
9600 Baud (9600 BAUD)
[5]
Function:
In this parameter, the speed is programmed at which
data is transmitted via serial communication. Baudrate
is defined as the number of bits transmitted per second.
Description of choice:
The transmission speed of the frequency converter
must be set at a value that corresponds to the
transmission speed of the master. Parameter 502
Baudrate
cannot be selected via serial communication;
it must be set via the LCP control unit.
The data transmission time itself, which is determined
by the baudrate selected, is only part of the
total communication time.
503 Coasting stop
(COASTING)
Value:
Digital input (DIGITAL INPUT)
[0]
Serial communication (SERIAL PORT)
[1]
Logic and (LOGIC AND)
[2]
✭
Logic or (LOGIC OR)
[3]
Function:
In parameters 503-508, a choice can be made
to control the frequency converter via the digital
inputs and/ or via serial communication.
If
Serial communication
[1] is selected, the command
in question can only be activated if a command
is given via serial communication.
If
Logic
and [2] is selected, the function must in
addition be activated via a digital input.
Description of choice:
The table below shows when the motor is running and
is coasting when
Digital input
[0],
Serial communication
[1],
Logic and
[2] or
Logic or
[3] has been selected.
NB!:
Please note that terminal 27 and bit 03 of the
control word are active in the case of logic
’
0
’
.
Digital input
[0]
Serial communication
[1]
Serial
Serial
Kl. 27
com. Function
Kl. 27
com. Function
0
0
Coasting
0
0
Coasting
0
1
Coasting
0
1
Motor run.
1
0
Motor run.
1
0
Coasting
1
1
Motor run.
1
1
Motor run.
Logic and
[2]
Logic or
[3]
Serial
Serial
Kl. 27
com. Function
Kl. 27
com. Function
0
0
Coasting
0
0
Coasting
0
1
Motor run.
0
1
Coasting
1
0
Motor run.
1
0
Coasting
1
1
Motor run.
1
1
Motor run.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.83.A2.02 - VLT is a registered Danfoss trademark
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