Power Control - Siemens SIPLUS HCS Series Operating Instructions Manual

Functions
9.3 Power output control
9.3.9

Power control

Operating principle
With phase control, the setpoint specification does not occur with values between 0 and
100%, but rather as an output value between 0 and 9600 W.
Note
Output control cannot be used with an economy circuit.
The output control can be combined with the control types half-wave control and phase
angle control as well as with all soft start options.
If the specified output cannot be reached, an error message is generated. The channel is not
switched off, however.
It is also possible to use fields. You must ensure that the field setpoint value continues to be
given in percent.
Output control with half-wave control
For each channel, based on the power rating, a setpoint value for control is calculated and
generated, as described in section Half-wave control (Page 132).
The time basis for output control for 100 half-waves is: Every 100 half-waves, a new setpoint
value is calculated and controlled. This time cannot be changed by the user.
● Switching on a heating element without soft start
Switching on is controlled with a certain number of half-waves at 100%. Thereafter, it
switches to output control.
● Switching on a heating element with soft start
The transition to output control occurs upon ending the soft start.
Output control with phase angle control
For each channel, based on the power rating, a setpoint value for control is calculated and
generated, as described in section Phase angle control (Page 134).
The time basis for output control is 21 half-waves: Every 21 half-waves, a new setpoint value
is calculated and controlled. This time cannot be changed by the user.
● Switching on a heating element without soft start
Switching on is controlled with a certain number of half-waves at 100%. Thereafter, it
switches to output control.
● Switching on a heating element with soft start
The transition to output control occurs upon ending the soft start.
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SIPLUS HCS4200 PROFINET/PROFIBUS DP
Operating Instructions, 07/2019, A5E35066204A/006