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Command Reference: Function Blocks
Section 6-5
General Description
The Two-hand Control function block enables monitoring the status of a two-
hand switch.
The Two-hand Control function block can be used with a suitable 2-hand
switch to meet the requirements of type III C in EN 574,
Two-hand Control
Devices, Functional Aspect – Principle for Design.
The Output Enable signal will turn ON only if both inputs from the two-hand
switch are active and satisfy the requirements of EN 574. The Output Enable
signal will turn OFF if the inputs from the two-hand switch do not satisfy the
requirements of EN 574, an input is inactive, or if an error is detected for the
function block.
Set Parameters
The discrepancy times must be equal to or greater than the NE1A-series Con-
troller’s cycle time.
Optional Output Settings
The following error outputs can also be used in programming. To enable either
of these optional outputs, select the checkbox on the Out Point Tab Page of
the function block properties dialog box.
Discrepancy Error Pair 1
Discrepancy Error Pair 2
Fault Present Output Setting
Fault Present output can also be used in programming.
To enable this output, select the Use Fault Present checkbox on the Out Point
Tab Page of the function block properties dialog box.
Maximum Number of I/O for a Two-hand Control Function Block
Parameter
Setting range
Default setting
Discrepancy Time
Pair 1
0 to 500 ms in 10-ms increments
30 ms
Discrepancy Time
Pair 2
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...