Smart Process Gating
Leuze electronic GmbH + Co. KG
MLC 530 SPG
18
4
Smart Process Gating
4.1
Overview and principle
Smart Process Gating (SPG) is a timing-controlled control process for access guarding with bridging func-
tion.
• SPG is used only for material transport out of or into danger zones.
• SPG uses two independent control signals to activate the bridging function.
• External sensors are not necessary.
SPG principle
Activation of the bridging function takes place by means of two independent control signals:
• A CS switching signal (“controller signal”) from a control.
• A PFI protective field violation signal that was triggered by the transport material which must be de-
tected by the receiver within 4 s (2 s in operating mode 4) after the CS switching signal is applied.
NOTICE
The safety sensor must remain in sync in order to receive a valid protective field violation
signal PFI!
The two synchronization beams of the safety light curtain can be simultaneously interrupted for
no more than 60 s during the SPG process.
Ä
Make certain that one synchronization beam always remains free.
