VLT
®
Series 3500
93
★
= ROM default setting.
✔
= Normal Danfoss setup. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
Serial Communication Parameters
500 Address (ADDRESS)
Value:
01 to 99
★
01
Function:
Specifies the address of each VLT drive. If the master (PLC
or PC) gives the address 00, communication is sent to all
linked VLT drives at the same time. In that case the unit
does not send back a response to the master. If the number
of units exceeds 31, a repeater must be used. Parameter
500 must be set locally at each unit. It cannot be selected
via the serial bus.
501 Bits/Sec. Baud Rate (BAUD RATE)
Value:
300, 600, 1200, 2400, 4800, 9600
★
9600
Function:
This parameter sets the speed at which data are transmit-
ted.
This value is defined as the number of bits transmitted per
second. The transmission speed of the VLT drive must be
set to match the PC or PLC transmission speed. Parameter
501 must be set locally at each unit. It cannot be selected
via the serial bus. The data transmission time itself, which
is determined by the set baud rate, is only part of the total
communication time. The total time for sending to the VLT
drive and receiving a response is between 320 msec. and
480 msec.
502 Data Readout (DATA READO)
Value:
★
0
Reference
(REFERENCE %)
----%
1 Frequency (FREQUENCY Hz)
----Hz
2 Display/Feedback
(FEEDBACK UNIT)
----“unit”
3 Current (CURRENT A)
----A
4 Torque (TORQUE %)
----%
5 Power (POWER kW)
----kW
6 Power (POWER HP)
----HP
7 Energy (ENERGY kWh)
----kWh
8 Motor voltage
(OUTPUT VOLT.V)
----V
9 DC voltage (DC BUS V)
----V
10 Motor thermal load
(ETR (MOT) %)
----%
11 Thermal inverter load
(ETR (VLT) %)
----%
12 Digital input (DIG INP. CODE)
binary code
13 Analog input 1
(ANALOG IN 53)
in terminal
53
14 Analog input 2
(ANALOG IN 60)
in terminal
60
15 Warning parameter
(WARNING CODE)
binary code
16 Control word
(CONTROL WORD)
17 Status word
(STATUS WORD)
18 Alarm parameter
(ALARM CODE)
binary code
Function:
This parameter is a read-only parameter. It is used for read-
ing out display texts, status messages, warnings and
alarms via the serial bus.
The data values for parameter 502 cannot be read out on
the display. The individual data values are read using index
reading, by setting byte 4 of the control word to “I”. The in-
dex number of the data value to be read is given in bytes
14 through 19.
