Test Program; B Determining The Cycle Time - Siemens Logo! Manual

B Determining the cycle time

The program cycle is the complete execution of the circuit
program, that is, primarily the reading in of the inputs, the
processing of the circuit program and the subsequent read-
ing out of the outputs. The cycle time is the time required to
execute a circuit program once in full.
The time required for a program cycle can be determined
using a short test program. This test program is created in
LOGO! and returns a value during its execution in parame-
ter assignment mode from which the current cycle time is
derived.

Test program

1. Create the test program by linking an output to a thresh-
old trigger and connecting the trigger input with an in-
verted flag.
M1
Par
M1
2. Configure the threshold trigger as shown below. A pulse
is generated in each program cycle due to the inverted
flag. The trigger interval is set to 2 seconds.
LOGO! Manual
A5E00380835-01
B1
Qx
B2
1
M1
Output Qx or
other flag Mx
303