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DeviceNet - Design
13
DEVICENET - DESIGN
13.1
Definition
• The DeviceNet is a field bus system which is based on the CAN protocol (Controller Area Network). It enables
actuators and sensors (slaves) to be networked with higher-level controllers (master).
• The control head in the DeviceNet is a slave device according to the Predefined Master/Slave Connection
Set stipulated in the DeviceNet specification. Polled I/O, Bit Strobed I/O and Change of Status (COS) are
supported as I/O connection variants.
• With DeviceNet it is necessary to differentiate between cyclical or event-driven high-priority process mes
-
sages (I/O Messages) and acyclical low-priority management messages (Explicit Messages).
• The protocol process conforms to the DeviceNet specification Release April 2010.
13.2
Electrical connection option
Cable gland with multi-pole connection
(M12 plug according to IEC 61076-2-101, 5-pole),
cable length approx. 80 cm
Connection left: Voltage, signals
Connection right: external initiator
Fig. 27: Connection concept DeviceNet
13.3
DeviceNet specification
EDS file:
8681.EDS
Icons:
8681.ICO
Baud rate:
125 kBit/s, 250 kBit/s, 500 kBit/s (can be adjusted using DIP switches 7, 8);
factory setting: 125 kBit/s
(see chapter “13.10.2 Setting the baud rate”)
Address:
0 ... 63 (via DIP switches 1 ... 6 adjustable);
factory setting: 63
(see chapter “13.10.1 Settings of the DeviceNet address”)
Process data:
2 static input assemblies
(Input: from control head to DeviceNet master/scanner)
1 static output assembly
(Output: from DeviceNet master/scanner to control head)
english
Control Head Type 8681
Summary of Contents for 8681
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