Programming Actions and Conditions
S7-GRAPH for S7-300/400 Programming Sequential Control Systems
C79000-G7076-C526-01
7-3
7.2
Standard Actions
Standard Actions - With and Without Interlock
All standard actions can be combined with an interlock. The actions are only
executed when the conditions of the interlock are fulfilled (letter C added).
Standard actions without an interlock are executed as long as the step is active.
Instruction
Address
Identifier
Address
Location
Meaning:
N[C]
Q,I,M,D
m.n
As long as the step is active [and interlock satisfied], the
address is set to 1.
S[C]
Q,I,M,D
m.n
Set: As soon as the step is active [and the interlock is
satisfied], the address is set to 1 and then remains set to
1 (latching)
R[C]
Q,I,M,D
m.n
Reset: As soon as the step is active [and the interlock is
satisfied], the address is set to 0 and remains at 0
(latching).
D[C]
Q,I,M,D
m.n
On (Delay): n seconds after the step is activated, the
address has signal 1 [if the interlock is satisfied] while
the step is active. This does not apply if the step is
active for a time shorter than n seconds (non-latching).
T#<const>
Time constant
L[C]
Q,I,M,D
m.n
Limited pulse: If the step is active [and the interlock is
satisfied], the address is set to 1 for n seconds (non
latching).
T#<const>
Time constant
CALL[C]
FB, FC, SFB,
SFC
Block number
Block call: As long as the step is active [and the interlock
is satisfied], the specified block is called.
[ ] = optional addition to the interlock; m = byte address; n = bit address; address range: 0.0 to 65535.7
Address D: DBi.DBXm.n = data block number i; DBXm.n = bit in the DB;
SFB/FB = system or normal function block; SFC/FC = system function or function
For CALL[C] FB/SFB, an instance DB is required.