Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 221
Chapter 8
Using SIL 2 Add-On Instructions with 1715
Redundant I/O Modules
SIL 2 Add-On Instructions
Overview
Topic Page
SIL 2 Add-On Instructions Overview 221
SIL 2 Check Data 224
Add-On Instruction Inputs 225
Add-On Instruction Outputs 226
Download and Import the Add-On Instructions 227
Configure an Input Module Add-On Instruction 230
Configure an Output Module Add-On Instruction 233
Using the Add-On Instruction Data Tags in an Application Program 237
Performing a SIL 2 Reset 238
IMPORTANT
To achieve SIL 2 with 1715 I/O modules in a ControlLogix® system,
you must use these Add-On Instructions. The SIL 2 Add-On
Instructions verify the validity of data that is transferred between
the ControlLogix controller and the 1715 modules via the 1715-AENTR
adapter. See Download and Import the Add-On Instructions
on
page 227.
As you proceed with this chapter, be aware that when using the 1715
SIL 2 Add-On Instructions, you do not read inputs directly from the
input table, nor do you write directly to the output tags. You read
inputs from an Add-On Instruction tag that is called ‘reconciled
input data,’ and write outputs to an Add-On Instruction tag called
‘requested output data.’
There is an Add-On Instruction that is required for the 1715-AENTR
adapter, as well. The status data from the 1715-AENTR adapter must
be validated by using this Add-On Instruction.
You cannot view the logic of each Add-On Instruction because it is
source protected.
Table 40 - SIL 2 Add-On Instructions
Module System Configuration Add-On Instruction Name
1715-IB16D
Simplex IB16D_Simplex_SIL2
IB16D_Simplex_SIL2_V3
Duplex IB16D_Duplex_SIL2
IB16D_Duplex_SIL2_V3
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