Rockwell Automation 2705 RediPanel Push Button Module - Manual (Page 61)

Chapter 4
Programming the RediPANEL Modules
4–22
Figure 4.9 shows handshake timing diagrams. They are not precise timing
diagrams. Timing varies from application to application and is dependent
upon the number of remote I/O nodes, program scan time, etc.
Figure 4.9
Handshake Timing Diagrams
Push Button Input
Push Button Contact
Program Scan
Write to Outputs
Read Inputs
Handshake Output Bit 17
Handshake Input Bit 17
PLC Scan Cycle
Handshake holds the push button input high even if the push button contact signal goes low.