Rockwell Automation Publication 5069-UM004A-EN-P - April 2019 51
Digital Module Operation in a Control System Chapter 1
Output Module Operation
Logix 5000 controllers send data to Compact 5000 I/O digital output
modules at the RPI or after an Immediate Output (IOT) instruction is
executed.
The RPI defines when the controller sends data to an output module and when
the module echoes data. The IOT instruction sends new data to an output
module whenever new data is produced.
At the RPI, not only does the controller send data to the output module, but
also the output module sends data to the controller. For example, the output
module sends an indication of the channel data quality.
The data exchange process between Compact 5000 I/O digital output
modules and a controller differs based on whether the module is a local I/O
module or remote I/O module.
5069-OBV8S
SIL2 CPU
5069-L3100ERMS2
Compact GuardLogix
5069-OBV8S
5069-IB8S5069-IB8S
OUTPUT OUTPUT
SA Power MOD Power
DC INPUT
5069-IB16
DC OUTPUT
5069-OB16
ANALOG INPUT
5069-IY4
SA Power MOD Power
ANALOG OUTPUT
5069-OF8
DC INPUT
5069-IB16
Standard Modules
Safety Modules
™
NET B1
LINK B1
NET A1
LINK A1
NET A2
LINK A2
SPEED X1
LINK X1
OK
RUN
FORCE
FAN 1
SD
FAN 2
CompactLogix 5480
B1
A1
1
2
A2
5069-L46ERMW
CONTROLLER
UPS
MP
SA
R
B
F
R
B
F
DC INPUT
5069-IB16
DC OUTPUT
5069-OB16
ANALOG INPUT
5069-IY4
ANALOG OUTPUT
5069-OF8
DC INPUT
5069-IB16
IMPORTANT CompactLogix 5380 and CompactLogix 5480 controllers can also send data
to Compact 5000 I/O standard output modules, that is, standard modules,
when an IOT instruction is executed.
Compact GuardLogix 5380 controllers cannot send data when an IOT
instruction is executed. You cannot use IOT instructions in safety
programs.
References to IOT instructions in this section apply only to
CompactLogix 5380 controllers.
IMPORTANT The RPI for a Compact 5000 I/O safety output module is the Safety Task
period. Safety output data is sent at the completion of the Safety Task scan.
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