Rockwell Automation 1794 FLEX I/O System with ControlLogix for SIL2 - Manual (Page 41)

Publication 1794-RM001G-EN-P - December 2011
FLEX I/O Modules 3-19
Checklist for SIL Outputs The following checklist is required for planning, programming and start up of
SIL outputs. It may be used as a planning guide as well as during proof testing.
If used as a planning guide, the checklist can be saved as a record of the plan.
For programming or start-up, an individual requirement checklist must be
filled in for every single SIL output channel in a system. This is the only way to
make sure that the requirements are fully and clearly implemented. This
checklist can also be used as documentation on the connection of external
wiring to the application program.
Output Check List for ControlLogix/FLEX I/O System
Company:
Site:
Loop definition:
SIL output channels in the:
No. All Output Module Requirements (apply to both digital and analog output modules) Yes No Comment:
1 Have you performed proof tests on the modules?
2 Is the RPI value set to an appropriate value for your application?
3 Have you set up fault routines, including comparing output data with a corresponding input point?
4 If required, have you used external relays in your application to disconnect module power if a short or
other fault is detected on the module or isolated output in series?
5 Is the control of the external relay implemented in ladder logic?
6 Have you examined the Output Data feedback signal in application logic?
7 Are all outputs configured to deenergize in the event of a fault or the controller entering program
mode?
8 Do two modules of the same type, used in the same application, use identical configurations?
9 Does one controller own both modules if two of the same type are used in an application?
10 Are control, diagnostics and alarming functions performed in sequence in application logic?
11 Is the application logic monitoring one ControlNet status bit for the associated module and is
appropriate action invoked via the application logic by these bits?
No. Digital Output Module-Only Requirements Yes No Comment
1 For the standard output modules, is the Communication Format set to Output Data?
2 For standard output modules, have you wired the outputs to a corresponding input to validate that the
output is following its commanded state?
No. Analog Output Module-Only Requirements Yes No Comment
1 Have you calibrated the modules as often as required by your application?
2 When wiring the FLEX I/O analog output module in current mode, are loop devices placed properly?
3 Have you written application logic to examine bits for any condition that may cause a fault and
appropriate fault routines to handle the fault condition?