Function Codes
WBPEEUI240751C0 6 - 7
3. A device problem report indicating duplicate device labels
is issued for the I/O blocks that have the duplicate labels. This
report can be seen on a human system interface.
This does not affect control configuration execution and the
controller will continue to operate and communicate as normal
with other I/O blocks.
Normal Operation
If an I/O block that has a duplicate label is inserted into a sys-
tem that has already established communication with another
I/O block:
1. The controller automatically relabels the offending block
with the device label “Duplicate Label Detected”. The text
string appears in the device label specification (S1) in FC 221.
2. The offending I/O block will display a duplicate label error
code (status LEDs 2, 4, and 5 on).
This does not affect control configuration execution and the
controller will continue to operate and communicate as normal
with other I/O blocks.
Function Codes
The Harmony controller and I/O blocks execute a control con-
figuration made up of function codes linked together and
loaded in nonvolatile memory to perform the actual process
control and process management. Function codes are pre-
defined, fixed function algorithms. The controller supports
numerous function codes for building the control configura-
tion. The functions they perform range from computing (func-
tion generator, square root, etc.) to control (PID, pulse
positioner, etc.) to I/O interface (analog input, digital output,
etc.). Refer to the Automation Architect
Automation ArchitectAutomation Architect
Automation Architect instruction for infor-
mation on how to build a control configuration.
I/O blocks are configured using a series of I/O block specific
function codes:
• I/O device definition (FC 221).
• Analog in/channel (FC 222).
• Analog out/channel (FC 223).
• Digital in/channel (FC 224).
• Digital out/channel (FC 225).
• Test status (FC 226).
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