Serial Communication - Danfoss VLT 2800 Series General Information Manual

Serial communication

500 Address
(BUS ADDRESS)
Value:
Parameter 500 Protocol = FC protolkol [0]
0 - 247
Parameter 500 Protocol = Metasys N2 [1]
1 - 255
Parameter 500 Protocol = MODBUS RTU [3]
1 - 247
Function:
This parameter allows the allocation of an address to
each variable frequency drive in a serial communica-
tion network.
Description of choice:
The individual variable frequency drive must be allo-
cated a unique address.
If the number of units connected (variable frequency
drives + master) is higher than 31, a repeater must be
used.
Parameter 500 Address cannot be selected via the
serial communication, but must be preset via the con-
trol unit.
501 Baudrate
(BAUDRATE)
Value:
300 Baud (300 BAUD)
600 Baud (600 BAUD)
1200 Baud (1200 BAUD)
2400 Baud (2400 BAUD)
4800 Baud (4800 BAUD)
9600 Baud (9600 BAUD)
Function:
This parameter is for programming the speed at which
data is transmitted via the serial port. Baud rate is de-
fined as the number of bits transmitted per second.
Description of choice:
The variable frequency drive's transmission speed
must be set at a value corresponding to the transmis-
sion speed of the master.
= factory setting, () = display text, [] = value for use in communication via serial communication port
84
VLT
Parameter 501 Baudrate cannot be selected via the
serial port, but must be preset via the operating unit.
502 Coasting Stop
(COASTING SELECT)
Value:
1
Digital input (DIGITAL INPUT)
1
Serial port (SERIAL PORT)
Logic and (LOGIC AND)
1
Logic or (LOGIC OR)
Function:
Parameters 502-508 allow a choice between control-
ling the adjustable frequency drive via the digital inputs
and/or via the serial port.
If Serial port [1] is selected, the relevant command can
only be activated if a command is given via the serial
port.
In the case of Logic and [2] the function must also be
activated via a digital input.
Description of choice:
The table below shows when the motor is running and
when it is coasting, when each of the following is se-
lected: Digital input [0], Serial port [1], Logic and [2] or
Logic or [3].
NOTE
Note that Coasting stop and Bit 03 in the
control word are active at logic '0'.
[0]
[1]
Digital input [0]
Dig. input
[2]
0
[3]
0
1
[4]
1
[5]
Serial port [1]
Dig. input
0
0
1
1
Logic and [2]
Dig. input
0
0
1
1
MG.27.A2.22 - VLT
®
2800 Series
Ser. port Function
0 Coasting
1 Coasting
0 Motor running
1 Motor running
Ser. port Function
0 Coasting
1 Motor running
0 Coasting
1 Motor running
Ser. port Function
0 Coasting
1 Motor running
0 Motor running
1 Motor running
®
is a registered Danfoss trademark
[0]
[1]
[2]
[3]