Zone Level Programming

If the system has up to 5 zones, or if PLC type PM554 or PM564 is used, then only one level is recommended.

For zone level programming, the function block TECT_TEMP_CONTROL is used for each zone in the programming. The Zone Data which contains the important information of a zone needs to be connected to the function block.

For each zone, the digital outputs DO_HEAT and DO_COOL as well as the analogous output DUTY_CYCLE can be used to connect to the output module. The temperature sensor feedback is connected to Function Block input ACT_TEMP_RAW.

For each zone, it is possible to add a noise filter to prevent short disturbances.

For multiple zones, it is just a multiplication of the one zone application.

Another function block TECT_PWM8 can be connected up to 8 TECT_TEMP_CONTROL function blocks to coordinate the outputs in time behavior. They have not to be switched on at the same time to avoid undesired voltage drop in the power supply system. At the same time, it compensates the error between digital outputs and duty cycle due to CPU task cycle (as resolution of digital outputs duration). For heating and cooling separate instances of this block have to be used.