Rievtech ELC Series - Page 87

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Programmable Relay ● User Manual for ELC, EXM and PR Series 87 2020 v6.0 ● © Rievtech Co.,
Ltd. ● www.rievtech.com
Description of function
The output of an AND with edge evaluation is only 1 if all
inputs are 1 and at least one input was 0 during the last
cycle.
The output is set to 1 for the duration of one cycle and
must be reset to 0 for the duration of the next cycle before
it can be set to 1 again.
A block input that is not used (x) is assigned: x = 1.
The timing diagram of an AND with edge evaluation
NAND
Description of function
The output of a NAND function is only 0 if all inputs are
1, i.e. when they are closed.
A block input that is not used (x) is assigned: x = 1.
Table 14 NAND Block Function
Input1
Input2
Input 3
Input 4
Output
0
0
0
0
1
0
0
0
1
1
0
0
1
0
1
0
0
1
1
1
0
1
0
0
1
0
1
0
1
1
0
1
1
0
1
0
1
1
1
1
1
0
0
0
1
1
0
0
1
1
1
0
1
0
1
1
0
1
1
1
1
1
0
0
1
1
1
0
1
1
1
1
1
0
1
1
1
1
1
0
NAND with Edge Evaluation
Description of function
The output of a NAND with edge evaluation is only 1 at
least one input is 0 and all inputs were 1 during the last
cycle.
The output is set to 1 for the duration of one cycle and
must be reset to 0 at least for the duration of the next
cycle before it can be set to 1 again.
A block input that is not used (x) is assigned: x = 1.
The timing diagram of a NAND with edge evaluation