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DeviceNet based on the CAN bus is one of the world's leading device-level networks for industrial automation. In fact, more than 40% of end users surveyed by independent industry analysis report choose DeviceNet over other networks.
ICP DAS has been developing CAN based DeviceNet protocol products for several years, include PCI interface card, gateway, DeviceNet IO and DeviceNet module for ICP DAS’s PACs — WinPAC/WinCon/ LinCon/I-8000 s eries main contol unit. We also help customers to resolve various DeviceNet network technology problems. In addition, we can provide DeviceNet solution for users. ICP DAS also holds DeviceNet conference, exhibition and training course all over the world.

Pre-Defined Master Slave Connection Set

IDENTIFIER BITS											IDENTITY HEX
10	9	8	7	6	5	4	3	2	1	0	IDENTITY HEX
0	Group 1 Message ID				Source MAC ID						Group 1 Messages
0	1	1	0	1	Source MAC ID						Slave’s I/O Change of State or Cyclic Message
0	1	1	1	0	Source MAC ID						Slave’s I/O Bit–Strobe Response Message
0	1	1	1	1	Source MAC ID						Slave’s I/O Poll Response Message
1	0	MAC ID						Group 2 Message ID			Group 2 Messages
1	0	Source MAC ID						0	0	0	Master’s I/O Bit–Strobe Command Message
1	0	Source MAC ID						0	0	1	Reserved of Master’s Use -- Use id TBD
1	0	Source MAC ID						0	1	0	Master’s Change of State/Cyclic Acknowledge Message
1	0	Source MAC ID						0	1	1	Slave’s Explicit Response Messages
1	0	Destination MAC ID						1	0	0	Master’s Connected Explicit Request Messages
1	0	Destination MAC ID						1	0	1	Master’s I/O Poll Cmd/Cha of State/Cyclic Message
1	0	Destination MAC ID						1	1	0	Group 2 Only Unconnected Explicit Request Messages
1	0	Destination MAC ID						1	1	1	Duplicate MAC ID Check Messages

DeviceNet Message Groups

IDENTIFIER BITS											IDENTITY USAGE	HEX RANGE
10	9	8	7	6	5	4	3	2	1	0	IDENTITY USAGE	HEX RANGE
0	Group 1 Message ID				Source MAC ID						Group 1 Messages	000–3ff
1	0	MAC ID						Group 2 Message ID			Group 2 Messages	400–5ff
1	1	Group 3 Message ID			Source MAC ID						Message Group 3	600-7bf
1	1	1	1	1	Group 4 Message ID						Group 4 Messages	7c0–7ef

There exist two memory areas, “Input Area” and “Output Area”. The input data of all DeviceNet slaves would be stored in the “Input Area” by DeviceNet master scan engine. Oppositely, the output data of those DeviceNet slaves would be in the “Output Area”. Please refer to the following figure.

Users can read a bulk data from “Input Area” in the DeviceNet Master module, like PISO-DNM100U or I-8124W. This bulk data contains multiple devices’ input statuses. If one of the input status of the remote DeviceNet slave changes, the corresponding data located in the “Input Area” would change immediately. Oppositely, the “Output Area” contains multiple devices’ output data. Users may change the output value of a certain device by changing the corresponding data located in the “Output Area”.

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