ATIM_ACW-DINRSM_UG_EN_V2.8
24
The ACW will return multiple frames with all its parameter settings:
Description and value
Octet 1
Response to command frames: 0x07
Octet 2
‘Obtain complete configuration’ command: 0x04
Octet 3, n
The parameters contained in the configuration frames.
Obtain the protocol version in use
To obtain information about the version of the ATIM Downlink protocol implemented in the ACW-DIN-RSM,
you must send it the following command:
Octet 1
Octet 2
0x01
0x07
The ACW will return the version number in the following format:
Description and value
Octet 1
Response to command frames: 0x07
Octet 2
‘Protocol version’ command: 0x07
Octet 3
Protocol version (LSB)
Octet 4
Protocol version (MSB)
Modbus request
To achieve a Modbus request, you would need to send the below command:
Octet 1 Octet 2 Octet 3
Octet 4
Octet 5
Octet 6
Octet 7
Octet 8
Octet 9 .. 12
0xC1
Size
0x7F
@Modbus
Slave
Function
code
@Reg/
bit
LSB
@Reg/b
it
MSB
Number of
registers/bit
s
Value of
bits/Register
to force
Size - Octet 2:
Frame size from octet n°3.
⚫
In case of requests:
⚫
0x01 = Function code 0x01, Read Coils.
⚫
0x02 = Function code 0x02, Read Discrete Inputs.
⚫
0x03 = Function code 0x03, Read Holding Registers.
⚫
0x04 = Function code 0x04, Read Input Registers
The size must match to the value of 6, because octets 9..12 are not necessary in case of reading requests;
and the global size of the command must not exceed 8 octets, in order to allow its emission through a
Sigfox downlink.
