Power Control Monitoring; Monitoring Of Adaptive Soft Start - Siemens SIPLUS HCS Series Operating Instructions Manual

Functions
9.7 Monitoring functions
Conditions for secure control of the channels
NOTICE
Physical damage can occur
If the electric resistance through which the fault current flows exceeds twice the electric
resistance of the load, the corresponding channel can no longer be correctly controlled.
Therefore comply with the following condition for secure control of the channel:
R
fault
Displayed and actual fault current
Electric shock hazard
Can cause death or serious injury
The fault current is the current value averaged over 200 half-waves in case of half-wave
control. Due to the pulse pattern of semi-wave control, the fault current in individual semi-
waves might be higher than the displayed fault current.
Determining peak fault current
Peak fault current can be determined using a setpoint value correction:
Peak fault current = fault current / setpoint
Example: Fault current 400 mA; setpoint value 80%
Peak fault current = 400 mA / 0.8 = 500 mA
9.7.11

Power control monitoring

When using power control, reaching the nominal output is monitored. If nominal output is not
achieved at 100 % of the setpoint, an error message is generated. This does not cause the
output to switch off, heating is still possible.
9.7.12

Monitoring of adaptive soft start

When using a control mode with adaptive soft start, it is monitored whether the connected
heating element can actually be controlled by the POM. If this is not possible, an error
message is generated. The channel is not controlled in that case. The error message then
disappears when switching off the heater.
124
> 2 • R
load
WARNING
SIPLUS HCS4300 PROFINET/PROFIBUS DP
Operating Instructions, 10/2019, A5E35452705A/005