I-7242D user manual
I-7242D DeviceNet/Modbus RTU Gateway User’s Manual, July 2006, Version 1.1 92/124
2. Apply the Master’s Explicit Request Messages to set the Identify object.
Device Heartbeat interval Attribute ID : 0x0A
Master
(MAC
ID
=0x0A)
Slave
(MAC
ID
=0x09)
Slave response Device Heartbeat Message every two seconds.
If users want to cancel the heartbeat message, they must set the heartbeat
interval attribute value of the Identity object instance to zero.
_ Group 2 Message
| _ Destination MAC ID=0x09
| | _ Message ID =4
| | | _ Frag=0. Transaction ID=0. Source MAC ID= 0x0A
| | | | _ Service=set attribute
| | | | | _ Class ID=1
| | | | | | _ Instance ID=1
| | | | | | | _
Attribute ID= 0x0A
| | | | | | | | _
Attribute Data= 2 seconds
ID=10 001001 100. Data= 0A 10 01 01
0A
02 00
_ Group 2 Message
| _ Source MAC ID=0x09
| | _ Message ID =3
| | | _ Frag=0. Destination MAC ID= 0x09
| | | | _ Service code=0x4D
| | | | | _ Identity Object Instance ID=1
| | | | | | _ Device State=3
| | | | | __|_ _|__ ____ EV, SF, UF, DF and Consistency value
ID=10 001001 011. Data=0A CD 01 00 03 00 00 00