Pilz PNOZ m1p base unit - Manual (Page 58)

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]
4-21
4.5 Inputs and outputs
4 Burners
4.5 Inputs and outputs 4500 Inputs and outputs 4- 4.5.1 Element's inputs
Element's inputs 4-
4.5.1.1 Operation
Operation 4- E/As_Eingänge_Bedienung  Start: Switch burner on
The cycle is started via the start signal. The system can only be start-
ed if no error is present.
Start = 0, no action
Start = 1, switch burner on (pulse edge 0 -> 1)
 Stop: Switch burner off
Shutdown of the burner is started via the stop signal.
Stop = 0, no action
Stop = 1, switch off burner
 Reset: Fault lockout/reset error
The reset input is used to cancel the restart interlock after a fault
lockout. A reset signal resets the cycle to "Burner switched off" sta-
tus; the burner cycle can be restarted using the start signal.
Reset = 0, no action
Reset = 1, reset (pulse edge 0 -> 1)
4.5.1.2 Monitoring functions
Monitoring functions 4- E/As_Eingänge_Überwachungen  CHA 1: Safety chain 1
The inputs can be assigned to any signals. We recommend that you
connect E-STOP pushbuttons, which switch off the burner in an
emergency, or plant-dependent monitoring functions, such as tem-
perature or pressure monitoring devices, for example.
CHA 1 = 0: Safety chain interrupted
CHA 1 = 1: Safety chain closed
 CHA 2: Safety chain 2
Safety chain 2 has the same function as safety chain 1. Both safety
chains are of equal value. They are differentiated to improve diagnos-
tics.
CHA 2 = 0: Safety chain interrupted
CHA 2 = 1: Safety chain closed
 CHAi: Ignition and operation safety chain
This input has the same function as safety chains 1 and 2. However,
when there is a 0 signal, a fault lockout or safety shutdown will only
occur in between the steps Pre-ignition and Burner in operation, in-
clusive. If the input has a 0 signal before or after this point, it will have
no effect.
CHAi = 0: Safety chain interrupted
CHAi = 1: Safety chain closed