HCS DAC-42A - CMD = 6, Error from DAC-4 X(A) (4 Bytes); Telegram Example CMD = 6; Example, Write Parameter

DAC-42(A)-x-PN
Page 45
DAC-42(A)-x-PN Manual
Revision: 1.0 22.01.2024
8.3.3 CMD = 6, Error from DAC-4x(A) (4 bytes)
Write first…
Byte Abbreviation Description
0
TADR
Telegram
address, defined by the write command, Range 0..255, 0..0xFF
1
SADR
Slave address
2
ERR
Error code
3
EXCE
Exception
…Write last
ERR Error code: 0x86 = write failed
EXCE Exception:
1 = Command not supported
2 = Wrong ID
3 = Wrong Data Value
4 = Writing of ID failed
5 = timeout slave, address wrong or not installed or
Invalid number of connected slaves
6 = Internal checksum error (Modbus)
Example for error response:
SADR 3 is not valid and SADR in the master telegram is set to 3
Byte Data Abbreviation Description
0
0x23
TADR
Response telegram address (defined by the write command)
1
0x03
SADR
Actual slave address
2
0x86
ERR
Error, Bit „7“ with command 0x06 is set
3
0x05
EXCE
timeout
slave, address wrong or not installed
8.4 Telegram example CMD = 6
8.4.1 Example, write parameter
Master wants to write parameter „C1.07” with value 1.000 V:
ID = 0x0030
DATA = 0x3E8 ( = 1000 in decimal)
TADR = 0x23
SADR = 0x01
Byte Data Abbreviation
0
0x23
TADR
1
0x01
SADR
2
0x06
CMD
3
0x00
IDH
4
0x30
IDL
5
0x03
DATL
6
0xE8
DATH
Response from slave (module), command was successful executed
ID = 0x0030
DATA = 0x3E8 ( = 1.000 V)
Byte Data Abbreviation
0
0x23
TADR
1
0x01
SADR
2
0x06
CMD
3
0x00
IDH
4
0x30
IDL
5
0x03
DATL
6
0xE8
DATH