Eaton easySafety, Manual

Page: 276 / 695

Standard function blocks
272
02/16 MN05013001Z EN
LB, jump label Within the function block list jump label LB.. is the jump
target for a conditional jump with function block JC.. . In the
standard circuit diagram function blocks JC and LB are
always used in pairs.
easySafety allows the use of up to 16 jump labels.
Function block
Because function block LB.. acts only as a jump target, it
does not have to be linked in the circuit diagram and does
not have to be parameterized. It has neither coils nor
contacts and is simply placed at the required position in the
function block list.
In the function block list a jump label must be positioned
downstream, i.e. towards the end of the list when viewed
from associated function block “conditional jump”. If it is
placed in front of the associated jump location (backward
jump), the program branches to the end of the function block
list and fault contact JC..E1 of function block “conditional
jump” closes. If no associated jump label is set in the
function block list, the program jumps to the end of the list
and fault contact JC..E1 also closes.
Enter the function block editor from the main menu via
STANDARD -> PROGRAM -> FUNCTION RELAYS.
X
In this menu use the cursor buttons
ÍÚ
to move to the
location to which the jump is to be made and press OK.
X
Then use the cursor keys
ÍÚ
to select function block LB..
and close the input dialog with two clicks on OK.
The description of the JC function block, conditional jump, is
provided from
a
chapter “JC, conditional jump” on
page 268. This also contains an example.
h For each function block LB.. a corresponding function
block JC.. (conditional jump) must exist as jumping-off
point. Conditional jump JC01, for example, is always
associated with jump label LB01.