Pilz PNOZ m1p base unit - Manual (Page 46)

Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
4-9
4.3 Configuration in the PNOZmulti Configurator
4 Burners
4.3.2.7 Plant-dependent monitoring functions
Plant-dependent monitoring functions 4- Funktionsbeschreibung_Ueberwachungen_Sicherheitsketten
Plant-dependent monitoring functions, which are intended to trigger a
burner shutdown where necessary (e.g. when the temperature is too
high), must be incorporated into the safety sequences. In other words,
they must be linked to inputs CHA1, CHA2 or CHAi.
Monitoring functions which are intended to be active from burner start-
up to burner shutdown must be linked to either CHA1 or CHA2.
Monitoring functions which are only intended to be active during ignition
and burner operation must be linked to CHAi (see also section entitled
"Inputs and outputs").
4.3.2.8 Shutdown types
Shutdown types 4- Funktionsbeschreibung_Ueberwachungen_Abschaltungsarten
A controlled shutdown can be performed via the "Stop" input (e.g. if en-
ergy is no longer required). The burner is then brought to a stop.
An error is detected if the input signals within a step do not match the
values set for the monitoring operation. This will lead either to a fault
lockout or a safety shutdown, depending on the input signal and config-
uration. With both shutdown types, all outputs on the burner element are
shut down immediately and the sequence program is aborted.
 Safety shutdown
After a safety shutdown, the burner cycle is automatically restarted
after a configurable period, if there is no error present.
 Fault lockout
With a fault lockout, if there is no error present, it is necessary to reset
and then manually restart to enable a new burner cycle.
WARNING!
Loss of safety function due to incorrect use of the "Stop" in-
put!
If the "Stop" input is used to reproduce a safety shutdown or
fault lockout, serious injury or death may result, depending on
the application.
Only use the "Stop" input for a controlled shutdown.