198
Reaction Time
Section 9-4
Network reaction times #1 and #2 will be 24 ms each, based on a safety con-
nection EPI of 6 ms. The reaction times are obtained using the following equa-
tion:
Reaction time (ms) = Switch reaction time
+ Safety I/O Terminal input reaction time
+ Network reaction time #1
+ NE1A-SCPU01 remote input/remote output reaction time
+ Network reaction time #2
+ Safety I/O Terminal output reaction time
+ Actuator reaction time #2
= Switch reaction time
+ ON/OFF delay time (DST1-ID12SL-1) + 16.2
(= Input reaction time of DST1-ID12SL-1)
+ 24
+ 6
+ 24
+ 6.2 (= Output reaction time of DST1-MD16SL-1)
+ Actuator reaction time
=
76.4 + ON/OFF delay time (DST1-ID12SL-1)
+ Switch reaction time + Actuator reaction time
9-4-3
Verifying the Reaction Time
Always confirm the reaction time calculated for each safety change satisfies
the required specifications. If the reaction time exceeds the required specifica-
tions, consider the following items and correct the design of the network for
that reaction time requirements are satisfied.
•
The network reaction time can be reduced by shortening the EPI. This,
however, will also reduce the network band that can be used for other
connections.
•
The cycle time of the NE1A-series Controller is automatically calculated
based on the size of the program, the number of connections, and other
factors. The cycle time can be reduced by using separate NE1A-series
Controllers for safety chains that require high-speed reaction times.
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...