User manual

Publication 1760-UM001A-EN-P
Drawing a Circuit Diagram with Pico 4-37
Jumps
The 1760-L18AWA allows the use of jumps. Jumps can be used to optimize the
structure of a program or to implement the function of a selector switch. Jumps can
be used for example to select whether manual/automatic operation or other
machine programs are to be set.
Jumps consist of a jump location and a jump destination (label).
Circuit Diagram Symbols for Jumps
Function
If the jump coil is triggered, the circuit connections coming directly after it is not
processed. The states of the coils before the jump are retained, unless they are
overwritten in circuit connections that were not missed by the jump. Jumps are
always made forwards, i.e. the jump ends on the first contact with the same
number as that of the coil.
Coil = jump when 1
Contact only at the first leftmost contact = Jump destination
The Jump contact point is always set to 1
. Backward jumps are not possible with
Pico due to the way it operates. If the jump label does not come after the jump coil,
the jump is made to the end of the circuit diagram. The last circuit connection is
also skipped.
If a jump destination is not preset, the jump is made to the end of the circuit
diagram.
Multiple use of the same jump coil and jump contact is possible as long as this is
implemented in pairs, i.e.
• Coil {:1/jumped range/Contact:1
• Coil {:1/jumped range/Contact:1 etc.
Contact (can only be used as first leftmost contact) Make contact :
Numbers 1 to 8
Coils {
Numbers 1 to 8
Coil function {
NOTE
The states of jumped circuit connections are retained. The time
value of timing relays that have been started will continue to run.