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Functions
9.7 Monitoring functions
9.7.7
Power channel monitoring
Power output diagnostics
The Power Output Module has a diagnostics function to detect power output faults. In every
half-wave, the status of the power output is requested and checked at a fixed point in time.
The following faults are detected:
Fault
Heating element or radiator
wire defective
Triac breakdown
Incoming fuse has tripped
Outgoing fuse ruptured or triac
has high resistance
Reporting channel errors
Error states are only reported when the heater is switched on
(Switch on heating (Page 110)).
The only exception is the "Triac breakdown" error. This error is always reported regardless of
the heater status.
Suppression of channel errors
By default, errors are reported for all power outputs and channels. The user can, however,
define a list of channels for which errors should not be reported. This is appropriate when
some channels are not wired up in the plant.
122
Description and special characteristics
For POM4320 Highend:
For "phase-phase" connection and external fuse, even in case of
failure of the incoming fuse.
"Breakdown" means the triac is defective and conducts continuous-
ly even without being activated.
This fault can only be detected if the power output is switched off.
For a 100% setpoint, the fault can be neither detected nor
indicated.
For POM4320 Highend:
For "phase-phase" connection and internal fuse.
This fault can only be detected if the power output is switched on.
For a 0% setpoint, the fault is not detected and also cannot be
indicated.
Operating Instructions, 10/2019, A5E35452705A/005
SIPLUS HCS4300 PROFINET/PROFIBUS DP
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