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9.7.8
Power channel monitoring for loads connected in parallel
Diagnostics for loads connected in parallel
If several loads are connected in parallel at one output, in addition to the aforementioned
faults, the failure of at least one heating element can be detected.
For this, the corresponding details on the total output power and permitted deviation from
total power for the output must be entered (see section
CIM / POM configuration parameters (Page 86)).
The following fault is detected:
Fault
Partial load failure
Note
A parallel connection of flash radiators can result to a faulty diagnostics under the following
circumstance:
The setpoint with which the output is controlled falls short of 90%.
9.7.9
Current load monitoring
The current load per power output is monitored. If the measured current is above the
permitted operating range in normal operation (not startup after heating ON), an error
message "current load too high" is issued. The output can still be controlled, however.
9.7.10
Fault current monitoring
Any current which does not flow across the load connections, but rather irregularly over
another path (e.g. via the housing of the load), is referred to as fault current.
Fault current is monitored for connection type "2-pin switching" via a channel pair. The
threshold is set for each channel. In case the configured threshold is exceeded, an error
message is generated; however, this does not result in switch-off of the output. Heating
remains possible.
SIPLUS HCS4300 PROFINET/PROFIBUS DP
Operating Instructions, 10/2019, A5E35452705A/005
Points to note
Error message when power is too small
Functions
9.7 Monitoring functions
123
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