I-7242D user manual
I-7242D DeviceNet/Modbus RTU Gateway User’s Manual, July 2006, Version 1.1 101/124
2. Apply the Master’s Explicit Request Messages to set the User-defined
Modbus command object instance attribute 0x01.
Service (0x10)=Set attribute service, Data = 01 46 00.
Master
(MAC
ID
=0x0A)
Slave
(MAC
ID
=0x09)
_ Group 2 Message
| _ Destination MAC ID=0x09
| | _ Message ID =4
| | | _ Frag=0. Transaction ID=0. Destination MAC ID= 0x0A
| | | | _ Service=Set Attribute Request
| | | | | _ Class ID=0x65
| | | | | | _ Instance ID=0x01
| | | | | | | _ Attribute ID=0x01
| | | | | | | | _
Attribute Data= 0x01 0x46 0x00 -- Request Modbus
ID=10 001001 100. Data= 0A 10
65
01
01
01 46 00
Command
_ Group 2 Message
| _ Source MAC ID=0x09
| | _ Message ID =3
| | | _ Frag=0. Transaction ID=0. Destination MAC ID= 0x0A
| | | | _ Service= Set Attribute Response
| | | | |
| | | | |
ID=10 000011 011. Data= 0A 90