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Reaction Time
Section 9-4
The node 2 (#2) cycle times will be as follows:
NE1A-SCPU01 cycle time = 7 ms
I/O refresh cycle time = 3.5 ms
The network reaction time will be 28 ms based on a safety connection EPI of
7 ms. The reaction time is obtained using the following equation:
Reaction time (ms) = Switch reaction time
+ NE1A-SCPU01 #1 local input/remote output reaction time
+ Network reaction time
+ NE1A-SCPU01 #2 remote input/local output reaction time
+ Actuator reaction time
= Switch reaction time
+ ON/OFF delay time (NE1A-SCPU01) + 6 + 6
×
2
+ 28
+ 7
+ 2.5
+ Actuator reaction time
= 55.5 + ON/OFF delay time (NE1A-SCPU01)
+ Switch reaction time + Actuator reaction time
■
Example 4: Remote Input - Remote Output
The following example shows calculating the reaction time from a remote
input to a remote output, for the NE1A-SCPU01 configuration shown in the
illustration.
NE1A-SCPU01 node configuration:
• Program: 1 Reset, 1 E-STOP, 1 External Device Monitor
• Standard Slaves: 2 connections
• Safety Masters: 3 connections (EPI = 6 ms)
• Safety Slaves: None
The cycle times read by the Network Configurator will be as follows:
NE1A-SCPU01 cycle time = 6 ms
I/O refresh cycle time = 6 ms
DeviceNet
NE1A-SCPU01
Switch
Safety Connection
Network reaction time #1 = 24 ms
Cycle time = 6 ms
I/O refresh cycle = 6 ms
Actuator
Safety Connection
Network reaction time #2 = 24 ms
DST1-ID12SL-1
DST1-MD16SL-1
Summary of Contents for NE1A-SCPU01 - 07-2009
Page 3: ...iv...
Page 9: ...x TABLE OF CONTENTS...
Page 11: ...xii...
Page 15: ...xvi...
Page 70: ...35 Installation Section 3 1 Top Top Bottom Bottom...
Page 72: ...37 Installation Section 3 1 3 1 3 Dimensions and Weight Dimensions NE1A SCPU01 V1...
Page 85: ...50 Wiring Section 3 2...
Page 123: ...88 Explicit Message Communications Section 4 7...
Page 141: ...106 Safety Outputs Section 5 4...
Page 257: ...222 Connection Status Tables Section 10 8...
Page 261: ...226 NE1A series Controller Replacement Section 11 2...
Page 264: ...229 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 266: ...231 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 267: ...232 Appendix A Local Output Setting Example...
Page 269: ...234 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 270: ...235 Appendix A Local Output Setting Example...
Page 273: ...238 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 275: ...240 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 276: ...241 Appendix A Local Output Setting Example...
Page 289: ...254...
Page 293: ...258 Index...