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13.2
Communication Fault/Idle Mode Parameter
This parameter is used to set the behaviors of output points (bits) during a communication fault or an "idle" event
(when a PLC is "Idle mode" not in RUN mode). The parameter shown below is used to determine what state the
outputs will have during an "Idle" event and a "Fault" event. It will allow control of all output points, valves and
discrete I/O, on the manifold.
The user, through the graphic display or software, can determine how the outputs behave when a communication
fault or idle actions occurs. These settings are non-volatile and thus will not change upon loss of power.
The two behavior options are:
1.
Hold Last State of Outputs
2.
Turn Off All Outputs
Communication Fault/Idle Mode Sequence
The Communication Fault/Idle Mode parameter determines the output state if the device encounters a
communication fault and/or idle action. A Communication Fault is defined as an inability for the master node to
communicate with a slave node on a network. Idle Mode is a condition when the processor is in program mode.
The process for determining the output state during a Communication Fault/Idle Mode is as follows:
1.
The device receives a Communication Fault/Idle Mode event.
2.
The device determines what action to take based on the Communication Fault/Idle Mode attribute setting.
3.
If the attribute is set to turn off all outputs, all of the outputs will turn off (Factory Default Setting).
4.
If the attribute is set to hold last state, all of the outputs will hold their last state.
Turn OFF
All Outputs
Outputs
De-Energize
G3 Series PROFIBUS-DP
Communication
Fault Received
Device
Checks
Communication
Fault
Attribute
TDG3PTTM1-11EN
Subject to change without notice
www.asco.com
TM
Technical Manual
Hold Last State
Outputs
Do Not
Change State
07/2020
13-115
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