Rockwell Automation Publication 843ES-UM001A-EN-P - February 2020 23
Safety Concept Chapter 2
For safety system requirements, including information on the safety network
number (SNN), verifying the safety signature, and functional verification tests
refer to the appropriate GuardLogix controller publication as defined in
Additional Resources
on page 9.
Controller-based Safety Functions
Controller-based safety functions operate in a GuardLogix 5580 or Compact
GuardLogix 5380 controller and use the EtherNet/IP network to communicate
with the safety I/O. This includes the safety functions provided by the Drive
Safety tab of your Studio 5000 Logix Designer project.
The Bulletin 843ES CIP Safety encoder also supports the safety feedback (SFX)
instruction that provides safety position and velocity data to a GuardLogix safety
controller for use in controller-based monitoring functions.
Important Safety
Considerations
You are responsible for the following:
• Validation of any sensors or actuators that are connected to the system
• Completing a machine-level risk assessment
• Certification of the machine to the desired ISO 13849 Performance Level
or IEC 62061 SIL level
• Project management and proof testing in accordance with ISO 13849
Performance Level (PL) and
Safety Integrity Level (SIL)
For safety-related control systems, Performance Level (PL), according to ISO
13849-1, and SIL levels, according to IEC 61800-5-2, IEC 61508, and IEC
62061, include a rating of the ability of the system to perform its safety-related
functions. All safety-related components of the control system must be included
in both a risk assessment and the determination of the achieved levels.
See ISO 13849-1, IEC 61508, and IEC 62061 standards for complete
information on requirements for PL and SIL determination.
IMPORTANT You must read, understand, and fulfill the requirements that are detailed in the
GuardLogix controller systems safety reference manual before operating a
safety system that uses a GuardLogix controller and a 843ES CIP Safety encoder.
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