---( N )--- Negative RLO Edge Detection

---( N )---    Negative RLO Edge Detection
Symbol
<address>
---( N )

Parameter      Data Type    Memory Area        Description
 <address>       BOOL         I, Q, M, L, D    Edge memory bit, storing the previous signal state of RLO 
Description 
---( N )--- (Negative RLO Edge Detection) detects a signal change in the address from "1" to "0" and
displays it as RLO = "1" after the instruction. The current signal state in the RLO is compared with the
signal state of the address, the edge memory bit. If the signal state of the address is "1" and the RLO
was "0" before the instruction, the RLO will be "1" (pulse) after this instruction, and "0" in all other
cases. The RLO prior to the instruction is stored in the address.

The edge memory bit M0.0 saves the old RLO state. When there is a signal change at the RLO from
"1" to "0", the program jumps to label CAS1.

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