Parallel Connection Of Channels - Siemens SIPLUS HCS Series Operating Instructions Manual

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 106).
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 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 108).
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.
Response time of the power control
Due to the operating mode and the measurement technology, a changed control value is
only output after the following time:
● Half-wave control: 1 s
● Phase control: 21 ms
● Closed delta: 4.13 s
9.3.11

Parallel connection of channels

It is possible to control one load over two power outputs. It must be noted that in case of
"Connection between phase and phase (internal fuse)" the return must be in parallel design
as well.
There are no restrictions with regard to control mode and power control as long as the
minimum load is observed.
SIPLUS HCS4300 PROFINET/PROFIBUS DP
Operating Instructions, 10/2019, A5E35452705A/005
Functions
9.3 Power output control
115