Danfoss VLT Flow Drive FC 111 Design Manual page 116

VLT® Flow Drive FC 111
Design Guide
Bus ad- Bus PLC reg-
dress regis- ister
ter
(1)
3 4 40004
4 5 40005
5 6 40006
6 7 40007
7 8 40008
8 9 40009
9 10 40010
19 20 40020
29 30 40030
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
1
the telegram.
8.8.9 Access via PCD Write/read
The advantage of using the PCD write/read configuration 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 flexible 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 drive, the data includes control word, reference, and application dependent
data like minimum reference and ramp times, and so on.
The control word and reference is always sent in the list from the controller to the drive.
The PCD write list is set up in parameter 8-42 PCD Write Configuration.
The PCD read list is data sent from the drive to the controller like status word, main actual value, and application dependent data
like running hours, motor current, and alarm word.
The status word and main actual value is always sent in the list from the drive to the controller.
116 | Danfoss A/S © 2021.04
Content Access
Free –
Free –
Modbus configu- Read/Write
ration
Last fault code Read only
Last error register Read only
Index pointer Read/Write
Parameter 0-01 Dependent on
Language parameter ac-
cess
Free –
Parameter 0-03 Dependent on
Regional Settings parameter ac-
cess
N O T I C E
N O T I C E
RS485 Installation and Set-up
Description
–
–
TCP only. Reserved for Modbus TCP (parameter 12-28
Store Data Values and parameter 12-29 Store Always -
stored in, for example, EEPROM).
Fault code received from parameter database, refer to
WHAT 38295 for details.
Address of register with which last error occurred, refer
to WHAT 38296 for details.
Subindex of parameter to be accessed. Refer to WHAT
38297 for details.
Parameter 0-01 Language (Modbus register = 10 param-
eter number) 20 bytes space reserved for parameter in
Modbus map.
–
Parameter 0-03 Regional Settings 20 bytes space re-
served for parameter in Modbus map.
AJ363928382091en-000101 / 130R0983