Siemens NAN 67 Series Wartungshandbuch PDF herunterladen (Seite 41)

3-17

Ladder Logic (LAD) for S7-300 and S7-400

C79000-G7076-C504-02

Some coils require preceding logic and some coils cannot accept preceding

logic.

S Coils requiring preceding logic:

Output Coil ( ), Set Coil (S), Reset Coil (R)

Midline Outputs (#) and Positive (P) or Negative (N) RLO

Edge Detection.

All Counter and Timer Coils

Jump-If-Not (JMPN)

Master Control Relay On (MCR<)

Save RLO to BR Memory (SAVE)

Return (RET)

S Coils that do not accept preceding logic:

Master Control Relay Activate (MCRA)

Master Control Relay Deactivate (MCRD)

Open Data Block (OPN)

Master Control Relay Off (MCR>)

All other coils can accept preceding logic but do not require it.

The following coils must not be used as parallel outputs:

Jump-If-Not (JMPN)

Jump (JMP)

Call FC SFC from Coil (CALL)

Return (RET)

Passing power to (activating) the enable input “EN” or the enable output

“ENO” of a logic box is possible but not necessary.

If a branch only consists of one instruction, deleting this instruction removes

the whole branch.

If you remove a box, all branches connected to the box with logic inputs,

with the exception of the main branch, are removed.

The overwrite mode is ideal for exchanging elements of the same type (see

Section 3.13).

Enable

Input/Enable

Output

Removing and

Changing

Creating Logic Blocks

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 317 318

Keine Kommentare

Siemens NAN 67 Series Wartungshandbuch Seite 41