Example To Illustrate Operations Affecting The Control Behavior - Honeywell Experion PKS User Manual

9 PROFIBUS I/O MODULE (PIOMB) FUNCTION BLOCK
Attention
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Notifications
The PIOMB block reports the following notification.
• Communication Error.

9.3.1 Example to illustrate operations affecting the control behavior

In the following example, the CM1 has a PROFIBUS AI channel (represents a channel from a PROFIBUS DP)
connected to C300 Dataacq block. This block is connected to PID.P1 and the PID.OP is connected to a
PROFIBUS AO channel (represents a channel from a PROFIBUS DP).
The following table summarizes the behavior of the input/output type PIOMB under various scenarios.
Attention
A fail-safe value means analog values are set to NaN, digital values are set to Off, and the status is set to "Bad."
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To prevent the process data from being scaled, you can set the channel high and low range as "NaN" when
configuring the DSB. When this is performed, the process value will be limited to those values supported by the
data type.
You can view the channel high and low range values from the Channel Configuration tab.