Requirement For New Setpoint - Siemens SIMATIC S5 ET 200U Manual

Example
You want to control a drive by using the outputs of the counter module. After
a run of positioning, both setpoints are reached and both outputs are turned
on. You can enter the new setpoints by using the sequence shown in Figure
9-25. The circled numbers are explained following the figure.
Figure 9-25 Requirement for New Setpoint
1. Transfer the new setpoints to the module. Since both diagnostic bits S1
2. Switch the signal now at the enable input to 0. With the falling edge, the
3. Switch the signal at the enable input again to 1. The new setpoints are
4. After reaching the new setpoints, the respective output is turned on again.
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
Enable
Input
Output Q0/
Diagn. Bit S1
Output Q1/
Diagn. Bit S2
S1
Old
and S2 are set to 1, the actual values are not yet accepted.
outputs are switched off and the diagnostics bits are reset.
accepted and are now active.
Function Modules
(3)
(2) (4)
(4)
(1)
S2 S1 S2
New
Old New
9-41