Timing Controlled 2-Sensor Muting With Muting-Enable; Overriding And Muting Restart - Leuze electronic MSI-MD-FBX Original Operating Instructions

MS1
MS2
PFF
MUTE
OSSD
< 4s
MS1 Muting signal 1
MS2 Muting signal 2
PFF Protective field free
MUTE Bridging through muting
OSSD OSSD status
Fig. 4.2: Timing controlled muting - timing
The material can move in both directions. Often, an arrangement consisting of crossed beams from retro-
reflective photoelectric sensors is used (see chapter 6.2 "Arrangement of the muting sensors").
Timing controlled muting is used in the following cases:
• Moving-in applications: diffuse sensors in the danger zone detect the muting object through the protec-
tive field. The scanning range must be set to a sufficiently small value (see chapter 6 "Mounting").
• Exit applications: a photoelectric sensor in the danger zone works diagonally to the transport direction
together with a simultaneously activated machine interface signal, which derives from the drive of the
transport equipment, for instance (see chapter 6 "Mounting").
Risk of death if installation is not performed correctly!
Ä Follow the instructions for the correct arrangement of the muting sensors (see chapter 6.2
"Arrangement of the muting sensors").
4.1.1

Timing controlled 2-sensor muting with Muting-enable

With the muting enable function, muting is enabled or disabled via an external muting enable signal. The
muting enable function is activated and deactivated via the DIP switch blocks (Starting up the device - Con-
figuration).
• If the muting enable signal is applied, a valid muting sequence initiates muting.
The muting enable signal must be applied at least 60 ms before muting is initiated.
The muting enable signal must not be applied for more than 100 hours.
• If the muting enable signal is not applied, no muting is possible, even with a valid muting sequence.
4.2

Overriding and muting restart

Following malfunctions or operationally related interruptions (e.g. power failure, violation of the simultaneity
condition during timing controlled 2-sensor muting on activation of the muting sensors), the system can be
manually reset with the acknowledgment unit and overridden.
• Muting override must only be initiated if at least one muting sensor is activated and the OSSDs of the
muting controller are switched off.
• Muting override is maintained only if at least one muting sensor is activated.
• The muting controller switches on its OSSDs when muting override is activated.
• For muting override or muting restart, the maximum muting timeout time is 10 minutes.
Leuze electronic
< 4s
DANGER
< 0,3 s
MSI-MD-FBX
Functions
> 4s
15