Rockwell Automation 198 Series C Modular DeviceNet Starter Auxiliary User Manual - Manual (Page 41)

Operation 3-20
Publication 198-UM002A-EN-P December 2001
Input Filtering
The MDSA contains an “Off-to-On Delay” parameter (parameter 22 for Cat. No. 198-DNG;
parameter 32 for Cat. No. 198-DN) and an “On to Off Delay” parameter (parameter 23 for
Cat. No. 198-DNG; parameter 33 for Cat. No. 198-DN). These parameters define time
constants for input filters.
The internal resolution of the input filters is 2 ms. Even-numbered time constants between
0…64 ms may be written to these parameters.
The on-to-off transition and the off-to-on transitions of each individual input on is filtered
separately.
DeviceNet Explicit Messaging
DeviceNet Explicit Messages are generally used to configure a DeviceNet device.
Configuration tools such as the “DeviceNet Manager” or “RSNetworx” use explicit messages
when communicating with a device. Some tools, such as Rockwell Software’s “RSServer for
DeviceNet” use explicit messages to help build custom DeviceNet system user interfaces for
a PC. When using such a tool, it is often useful to be able to control the outputs of the
Modular DSA system and also read the status information and the inputs of the