Publication 1794-RM001G-EN-P - December 2011
3-18
FLEX I/O Modules
Checklist for SIL Inputs
The following checklist is required for planning, programming and start up of
SIL inputs. 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 checklist can be filled in for every
single SIL input channel in a system. This is the only way to make sure that the
requirements were fully and clearly implemented. This checklist can also be
used as documentation on the connection of external wiring to the application
program.
Input Check List for ControlLogix/FLEX I/O System
Company:
Site:
Loop definition:
SIL input channels in the:
No.
All Input Module Requirements (apply to both digital and analog input modules)
Yes
No
Comment
1
Is the RPI value set to an appropriate value for your application?
2
Are all modules owned by the same controller?
3
Have you performed proof tests on the system and modules?
4
Have you set up the fault routines?
5
Are control, diagnostics and alarming functions performed in sequence in application logic?
Note: The user must ensure that the hardware series and the firmware series and revision of the FLEX I/O
modules in their system are SIL2 certified.
6
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.
Additional Digital Input Module-Only Requirements
Yes
No
Comment
1
When two digital input modules are wired in the same application, do the following conditions exist:
•
Both modules are owned by the same controller.
•
Sensors are wired to separate input points.
•
The operational state is ON.
•
The non-operational state is. OFF.
•
Configuration parameters (for example, RPI, filter values) are identical.
•
Both input modules are on different ControlNet nodes.
2
For the standard input modules, is the Communication Format set to one of the Input Data choices?
No.
Additional Analog Input Module-Only Requirements
Yes
No
Comment
1
Have you calibrated the modules as often as required by your application?
2
Are you using ladder logic to compare the analog input data on two channels to make sure there is
concurrence within an acceptable range and that redundant data is used 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?
4
When wiring the FLEX I/O analog module in voltage mode, are transmitter connections wired correctly?
5
When wiring the FLEX I/O analog module in current mode, are loop devices placed properly?
6
When wiring FLEX I/O thermocouple modules in parallel, have you wired to the same channel on each
module?
7
When wiring two FLEX I/O RTD modules, are two sensors used?
8
When two analog inputs are wired in the same application, are both modules on different ControlNet Nodes?
Summary of Contents for FlexLogix 1794
Page 1: ...FLEXI OSystemwithControlLogixforSIL2 Catalog Number Bulletin 1794 Reference Manual AB Drives ...
Page 18: ...Publication 1794 RM001G EN P December 2011 1 14 SIL Policy Notes ...
Page 22: ...Publication 1794 RM001G EN P December 2011 2 4 ControlLogix Communications ...
Page 42: ...Publication 1794 RM001G EN P December 2011 3 20 FLEX I O Modules Notes ...
Page 56: ...Publication 1794 RM001G EN P December 2011 A 10 Failure Estimates Notes ...
Page 59: ...AB Drives ...
