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3
Output Operation
Module hardware defaults are typically zero for VersaMax modules, so until configuration is
stored by the IO-Controller, outputs remain at zero. When the configuration is stored, the
outputs immediately transition to their configured default operation. Outputs remain at these
defaults until the first valid outputs are received from the IO-Controller. The amount of time
outputs remain at defaults is a function of the IO-Controller's design and the communication rate
configured between the IO-Controller and PROFINET scanner.
For example, if a discrete module is configured for a default value of 1 and there is a current
value of 0 in the CPU, on power up the output will be zero, then transition to 1 and then return to
0 when the output data is received.
Clearing the IO-Controller Configuration
The VersaMax PROFINET Scanner reacts to clearing the PROFINET IO-Controller as a loss of
connectivity, and takes appropriate actions such as defaulting outputs. A clearing on the
IO-Controller does not typically cause a clearing action on all connection IO-Devices.
GFK-2721A
Chapter 3 Configuration
3-11
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