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Safety Inputs
Section 5-2
IMPORTANT
Both input ON delays and OFF delays must be added to the I/O response per-
formance. This will affect the safety distance calculation.
For further details, refer to
Section 9 Remote I/O Communications Perfor-
mance and Local I/O Response Time
.
5-2-5
Dual Channel Mode Setting
An NE1A-series Controller’s local safety input terminals can be set to Dual
Channel Mode. Setting Dual Channel Mode enables the following.
• The status of the two inputs can be evaluated and reflected in I/O tags .
• The discrepancy time between changes in the status of the two inputs can
be evaluated.
Reflecting Input Status in Input I/O Tags
The status input to the safety input terminals is reflected in the I/O tags
according to the channel mode as shown in the following tables.
X = 0 to 15 (NE1A-SCPU01(-V1))
X = 0 to 39 (NE1A-SCPU02)
n = Even number
Input Discrepancy Time Evaluation
For two inputs set in Dual Channel Mode, the time is monitored from a change
in the value of one input to a change in the value of the other input (discrep-
ancy time ). When the value of the other input does not change within the set
discrepancy, it is regarded as an error. The set discrepancy time can be set in
increments of 10 ms between 0 (invalid) and 65,530 ms.
The discrepancy time cannot be set in Single Channel Mode.
Channel mode
Description
Single Channel
Used as an independent safety input terminal.
Dual Channel Equivalent
Used as a Dual Channel Equivalent Input with the paired safety
input.
Dual Channel Complemen-
tary
Used as a Dual Channel Complementary Input with the paired
safety input.
Channel mode
Input to safety
input terminal
Input Tag
Meaning of status
IN (x)
IN (x)
Single Channel
0
0
Inactive (OFF)
1
1
Active (ON)
Channel Mode
Input to safety
input terminal
Input Tag
Meaning of status
IN (n)
IN (n+1)
IN (n)
IN
(n+1)
Dual Channel
Equivalent
0
0
0
0
Inactive (OFF)
0
1
0
0
Discrepant
1
0
0
0
Discrepant
1
1
1
1
Active (ON)
Dual Channel
Complementary
0
0
0
1
Discrepant
0
1
0
1
Inactive (OFF)
1
0
1
0
Active (ON)
1
1
0
1
Discrepant
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...