I-7242D user manual
I-7242D DeviceNet/Modbus RTU Gateway User’s Manual, July 2006, Version 1.1 77/124
2. Apply the Master’s Explicit Request Messages to set the
expected_packet_rate attribute of the I/O connection and make the I/O
Connection Object State established.
Master
(MAC
ID
=0x0A)
Slave
(MAC
ID
=0x09)
3. Apply Bit-Strobe I/O Connection to access the IO modules
Master
(MAC
ID
=0x0A)
Slave
(MAC
ID
=0x09)
_ Group 2 Message
| _ Destination MAC ID=0x09
| | _ Message ID =4
| | | _ Frag=0. Transaction ID=0. Souce MAC ID= 0x0A
| | | | _ Service=Set Attribute Request
| | | | | _ Class ID=5
| | | | | | _ Instance ID=3 ( Bit Strobe IO connection Instance ID )
| | | | | | | _ Attribute ID=9
| | | | | | | | _ Attribute Data= 0x0E0A
ID=10 001001 100. Data= 0A 10 05 03 09 0A 0E
_ Group 2 Message
| _ Source MAC ID=0x09
| | _ Message ID =3
| | | _ Frag=0. Transaction ID=0. Destination MAC ID= 0x0A
| | | | _ Service= Set Attribute Response
| | | | | _Response Attribute Data=0x0E10
| | | | | |
| | | | | |
| | | | | |
ID=10 001001 011. Data= 0A 90 10 0E
_ Group 2 Message
| _ Destination MAC ID=0x09
| | _ Message ID =0
| | |
| | | _ Bit-Strobe 64-bit Output Data
| | | |
ID=10 001001 000. Data= FF FF FF FF FF FF FF FF
_ Group 1 Message
| _ Message ID =E
| | _ Source MAC ID=0x09
| | | _ Bit-Strobe Response Data
| | | |
ID= 0 1110 001001. Data= FF DF