Siemens SIMATIC S7-300 Product Information page 173

7. Choose from three different types of output cam:
8. In the "Proc. cycle clock" drop-down menu, select the time at which the output cam will be
9. In the "Type of output cam values" drop-down menu you decide whether the processing
Result
This completes the configuration in S7T Config.
Creating the S7 user program
As next step, create the user program.
Use the Technology Object Manager (TOM) to create a technology data block (TO-DB)
assigned to the "Output cam" technology object. The technology data block (TO-DB) allows
execution of the functions on the associated technology object using the provided FBs.
For controlling the output cam, use the MC_CamSwitch or MC_CamSwitchTime function
block in your S7 program.
If you have configured an additional level or edge-triggered hardware enable as described
above, use the MC_MeasuringInput function block for the associated required measuring
input function.
Connection of the SINAMICS S120 to the Technology CPU
Product Information, 09/2011, A5E00480378-04
– Position-based cam: The switching signal is on when the position of the axis lies
between two marks (start and end position).
– Time-based cam: The switching signal is activated for a specific duration of time after
the switching position is reached (start position).
– Uni-directional output cam: The switching signal is on when the axis has reached the
switching position (start position).. The output cam remains activated even after the
start position has been passed several times. The output cam must be reset explicitly.
processed. Because in this example a fast output cam has been created on the
TM17 module, the processing cycle clock should be set to IPO for this example.
of the output cam is based on the current setpoint or current actual value.
5.7 Triggering an output cam using the TM17 terminal module
Expert Functions
173