Danfoss VLT DriveMotor FCP 106, Руководство по программированию

Страница: 32 / 148

Field name Example (hex)
Slave address 01
Function 10
Starting address HI 04
Starting address LO 19
Number of registers HI 00
Number of registers LO 02
Error check (CRC) –
Table 3.23 Response
3.10.4 Read/Write Multiple registers (17
hex)
Description
This function code combines 1 read operation and 1 write
operation in a single Modbus transaction. The write
operation is performed before the read.
Query
The query message specifies the starting address and
number of holding registers to be read as well as the
starting address, number of holding registers, and the data
to be written. Holding registers are addressed starting at 0.
Example of a request to set
parameter 1-24 Motor Current
to 738 (7.38 A) and read parameter 3-03 Maximum
Reference which has value 50000 (50000 Hz):
Field name Example (hex)
Follower Address 01
Function 17
Read Starting Address HI 0B (Register address 3029)
Read Starting Address LO D5 (Register address 3029)
Quantity to Read HI 00
Quantity to Read LO 02
(
parameter 3-03 Maximum
Reference is 32 bits long,
that is, 2 registers)
Write Starting Address HI 04 (Register address 1239)
Write Starting address LO D7 (Register address 1239)
Quantity to Write HI 00
Quantity to Write LO 02
Write Byte Count 04
Write Registers Value HI 00
Write Registers Value LO 00
Write Registers Value HI 02
Write Registers Value LO 0E
Error Check (CRC) –
Table 3.24 Query
Response
The normal response contains the data from the group of
registers that were read. The byte count field specifies the
quantity of bytes to follow in the read data field.
Field name Example (hex)
Follower Address 01
Function 17
Byte Count 04
Read Registers Value HI 00
Read Registers Value LO 00
Read Registers Value HI C3
Read Registers Value LO 50
CRC –
Table 3.25 Response
3.11 FC Control Profile
3.11.1 Control Word According to FC Profile
(8–10 Protocol = FC profile)
Speed ref. CTW
Master-follower
130BA274.11
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit
no.:
Illustration 3.20 Control Word According to FC Profile
Bit Bit value=0 Bit value=1
00 Reference value External selection lsb
01 Reference value External selection msb
02 DC brake Ramp
03 Coasting No coasting
04 Quick stop Ramp
05 Hold output
frequency Use ramp
06 Ramp stop Start
07 No function Reset
08 No function Jog
09 Ramp 1 Ramp 2
10 Data invalid Data valid
11 Relay 01 open Relay 01 active
12 Relay 02 open Relay 02 active
13 Parameter set-up Selection lsb
15 No function Reverse
Table 3.26 Control Word According to FC Profile
Explanation of the control bits
Bits 00/01
Bits 00 and 01 are used to select among the 4 reference
values, which are pre-programmed in
parameter 3-10 Preset
Reference according to Table 3.27 .
RS485 Installation and Set-...
VLT
®
DriveMotor FCP 106/FCM 106
30 Danfoss A/S © 11/2015 All rights reserved. MG03N202
3 3