User Manual

SAFETY
Safety handbook page - 45 -
PNSPO
8.2 CIP-safety, DeviceNet safety 
“CIP” represents the Control Information protocol of DeviceNet, Ethernet IP and some
other bus systems. In 2002 three major automation companies ( OMRON, Rockwell
Automation and Sick) developed the CIP safety extension. This CIP safety provides a
open hybrid network that is the first media independent safety protocol.
The network is a real open system, because
the technology rights are transferred to ODVA
(Open DeviceNet Vendor Association). The
benefit is that a huge number of independent
companies offers products and services to
support CIP and CIP safety.
DeviceNet safety is CIP safety on CAN
(
C
ontroller
A
rea
N
etwork) media.
The features of CIP safety offer a unique combination of safety and productivity:
- Standard and safety devices can co-exist on the same wire
Standard devices must not interfere with the functions of the safety devices
Safety devices must not interfere with the functions of the standard devices
- Standard and safety connections supported on the same safety device
- Seamless routing of safety messages
Applicable to all CIP based networks
Safety protocol in end nodes only
Safety transactions between multiple networks using standard routers
- Protocol can handle small and large safety data packets
Two packet formats:
Short format - up to 2 bytes of safety data
Long format - up to 250 bytes of safety data
Communication can be performed in a lot of channels:
-
Controller communication on single link
Performs fast safety data communication between controllers and PLC
-
Controller communication over multiple links
Allows sophisticated communication between controller and PLC on
several media and networks
- Peer to peer communication on a single link
Fast direct communication from slave to slave in a isle within a complex structure
- Peer to peer communication over multiple links
Direct communication from slave to slave using communication over several
media and networks
- Peer to peer communication via controller logic
Slave communication using a controller or PLC for processingMulticatsing
communication where one “producer” addresses a multiple number of “consumers”
( limited broadcast )
CIP safety and DeviceNet safety provide a hybrid safety network up to SIL3, Cat 4.