Pilz PNOZ ml1p safe link 24VDC - Manual (Page 15)

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4-1
4.1 Device properties
4 Function Description
4 4000 Function Description Function Description 4- 4.1 Device properties 4100 Device properties 4- 4.1.1 Integrated protection mechanisms
Integrated protection mechanisms 4- Sicherheitseigenschaften_multi_allgemein
The relay conforms to the following safety criteria:
` The circuit is redundant with built-in self-monitoring.
` The safety function remains effective in the case of a component
failure.
4.1.2 Function description
Function description 4-
4.1.2.1 Operation
Operation 4- Funktionsbeschreibung PNOZ ml1p_1
The PNOZ ml1p link module is used to safely transfer the input informa-
tion from 32 virtual inputs and 32 virtual outputs between two PNOZmul-
ti systems. A link module is assigned to each base unit. Data is
exchanged cyclically.
Funktionen_multi_Basis
The function of the safety system's inputs and outputs depends on the
safety circuit created using the PNOZmulti Configurator. A chip card is
used to download the safety circuit to the base unit. The base unit has
2 microcontrollers that monitor each other. They evaluate the input cir-
cuits on the base unit and expansion modules and switch the outputs on
the base unit and expansion modules accordingly.
The LEDs on the base unit and expansion modules indicate the status
of the PNOZmulti safety system.
The online help on the PNOZmulti Configurator contains descriptions of
the operating modes and all the functions of the PNOZmulti safety sys-
tem, plus connection examples.
Funktionsbeschreibung PNOZ ml1p_2
Data exchange:
` Data is exchanged cyclically.
` After the end of a PNOZmulti cycle, each base unit sends its output
data to its link module. This output data is immediately sent to the link
module on the other base unit.
` At the same time, the base unit reads the input data from the link
module.