FC101 Design Guide

Bus
address
Bus
register
1)
PLC
register
Content Access Description
0 1 40001 Reserved –
Reserved for legacy frequency converters VLT
®
5000 and
VLT
®
2800.
1 2 40002 Reserved –
Reserved for legacy frequency converters VLT
®
5000 and
VLT
®
2800.
2 3 40003 Reserved –
Reserved for legacy frequency converters VLT
®
5000 and
VLT
®
2800.
3 4 40004 Free – –
4 5 40005 Free – –
5 6 40006 Modbus conguration Read/Write
TCP only. Reserved for Modbus TCP
(parameter 12-28 Store Data Values and
parameter 12-29 Store Always - stored in, for example,
EEPROM).
6 7 40007 Last fault code Read only
Fault code received from parameter database, refer to
WHAT 38295 for details.
7 8 40008 Last error register Read only
Address of register with which last error occurred, refer
to WHAT 38296 for details.
8 9 40009 Index pointer Read/Write
Subindex of parameter to be accessed. Refer to WHAT
38297 for details.
9 10 40010 Parameter 0-01 Language
Dependent on
parameter
access
Parameter 0-01 Language (Modbus register = 10
parameter number)
20 bytes space reserved for parameter in Modbus map.
19 20 40020 Free – –
29 30 40030
Parameter 0-03 Regional
Settings
Dependent on
parameter
access
Parameter 0-03 Regional Settings
20 bytes space reserved for parameter in Modbus map.
Table 7.18 Address/Registers
1) Value written in the Modbus RTU telegram must be 1 or less than the register number. For example, Read Modbus Register 1 by writing value 0
in the telegram.
7.8.9 Access via PCD write/read
The advantage of using the PCD write/read conguration is
that the controller can write or read more data in 1
telegram. Up to 63 registers can be read or written to via
the function code read holding register or write multiple
registers in 1 telegram. The structure is also exible so that
only 2 registers can be written to and 10 registers can be
read from the controller.
The PCD write list is data sent from the controller to the
frequency converter, the data includes control word,
reference, and application dependent data like minimum
reference and ramp times, and so on.
NOTICE!
The control word and reference is always sent in the list
from the controller to the frequency converter.
The PCD write list is set up in parameter 8-42 PCD Write
Conguration.
The PCD read list is data sent from the frequency converter
to the controller like status word, main actual value, and
application dependent data like running hours, motor
current, and alarm word.
NOTICE!
The status word and main actual value is always sent in
the list from the frequency converter to the controller.
RS485 Installation and Set-...
VLT
®
HVAC Basic Drive FC 101
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