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1-4 Description of Safety Functions
Setting Dual Channel Mode and Discrepancy Time
The consistency between signals on two channels can be evaluated. Either of the
following settings can be selected. This function monitors the time during which there is
a discrepancy in the logic between the two channels set as dual channels. If the length
of the discrepancy exceeds the set discrepancy time (0 to 65,530 ms, in increments of
10 ms), the safety input data and the individual safety input status will turn OFF for both
inputs.
IMPORTANT
The dual channel function is used with 2 consecutive inputs that start from
even input numbers: inputs 0 and 1, inputs 2 and 3, inputs 4 and 5, etc.
The following table shows the relation between terminal input and remote I/O data.
Input terminals
Remote I/O data
Dual channel mode
IN0
IN1
Safety input 0
Safety input 1
Meaning of
data
0 0 0 0
OFF
0 1 0 0
OFF
1 0 0 0
OFF
Dual Channel
Equivalent
1
1
1
1
ON
0 0 0 1
OFF
0 1 0 1
OFF
1
0
1
0
ON
Dual Channel
Complementary
1 1 0 1
OFF
1-14
Summary of Contents for DST1 Series
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Page 5: ...DST1 series Safety I O Terminals Operation Manual Produced April 2005 ...
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Page 24: ...Section 1 Overview ...
Page 44: ...Section 2 General Procedure ...
Page 50: ...Section 3 Configuration ...
Page 63: ...Section 4 Specifications ...
Page 67: ...Section 5 DST1 series ...
Page 79: ...Section 6 Troubleshooting and Maintenance ...
Page 87: ...Section 7 Wiring Examples ...
Page 97: ...Appendices ...
Page 114: ...Cat No Z904 E1 01 OPERATION MANUAL DST1 series Safety I O Terminals ...