Time Switch (Dtc) - Siemens SINAMICS G120 Operating Instructions Manual

6.7.12

Time switch (DTC)

The "time switch" (DTC) function, along with the real time clock in the inverter, offers the
option of controlling when signals are switched on and off.
Examples:
● Switching temperature control from day to night mode.
● Switching a process control from weekday to weekend.
Principle of operation of the time switch (DTC)
The inverter has three independently adjustable time switches. The time switch output can
be interconnected with every binector input of your inverter, e.g. with a digital output or a
technology controller's enable signal.
Figure 6-46
Settings for the example with DTC1
● Enable parameterization of the DTC: p8409 = 0.
As long as the parameterization of the DTC is enabled, the inverter holds the output of all
three DTC (r84x3, x = 1, 2, 3; r84x3.0 normal, r84x3.1 inverted status message) at LOW.
● Activate/deactivate the week day
- p8410[0] = 0
- p8410[1] = 1
- p8410[2] = 1
- p8410[3] = 0
- p8410[4] = 1
- p8410[5] = 1
- p8410[6] = 0
● Setting switching times:
– ON: p8411[0] = 20 (hh), p8411[1] = 0 (MM)
– OFF: p8412[0] = 10 (hh), p4812[1] = 0 (MM)
● Enable the setting: p8409 = 1.
The inverter re-enables the DTC output.
Additional information is provided in the parameter list of the List Manual.
Converter with CU230P-2 Control Units
Operating Instructions, 04/2015, FW V4.7 SP3, A5E34257946B AB
Example of the response of the time switch.
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Advanced commissioning
6.7 Application-specific functions
283