Controller functions
Page 60
RES-430
Version 1
10.20 System monitoring / alarm output
To increase operating safety and to avoid faulty heatsealing, the controller incorporates special hardware and soft-
ware features that facilitate selective fault detection and diagnosis. Both the external wiring and the internal system
are monitored.
These features crucially support the system owner in localizing the cause of an abnormal operating state.
A system fault is reported or differentiated by means of the following elements.
A.)
Error message on the display:
The cause of a fault can be localized quickly and easily with the help of the error code that appears on the display.
Please refer to section 10.21 "Error messages" on page 60 for a list of the possible error codes.
B.)
Error code output via the 0 to 10VDC actual value output (terminals 10+11):
Since a temperature indication is no longer necessary if a fault occurs, the actual value output is used to display
error codes in the event of an alarm.
13 voltage levels are offered for this purpose in the 0…10VDC range, each of which is assigned an error code
(
section 10.21 "Error messages" on page 60).
If a state that requires AUTOCAL occurs – or if the controller configuration is incorrect – (error codes 104…106,
111…114 or 211), the actual value output jumps back and forth at 1Hz between the voltage value that corresponds
to this error and the end of the scale (10VDC, i.e. 300°C or 500°C). If the "START" signal is activated in one of
these states, the voltage value does not change any more (as of software revision 008).
An alarm can only be reset by pressing the "RESET" key or by switching the controller off and then
on again.
10.21 Error messages
The table below shows how the analog voltage values that appear at the actual value output are assigned to the
faults that have occurred. It also describes each fault and the required corrective action.
The block diagram in section 10.22 "Fault areas and causes" on page 63 permits each fault to be cleared quickly
and efficiently.
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