Mitsubishi Electric WS0-CPU0 - Cross muting - direction of movement only forwards or backwards

Chapter 9
222
Logic programming – Function blocks
9.10.8 Cross muting – direction of movement only forwards or backwards
Function block diagram
Representation of the application
Figure 206 shows an example of the sensor layout for the Cross muting function block.
The optional input C1 is used as an additional protection for the muting system against
manipulation.
The protective effect of the protective device is muted when the muting sensors are
operated in a defined sequence. The optional input C1 always has to be activated
before both muting sensors of the first sensor pair (e.g. A1 and A2) become High.
Input conditions for muting sensors
Condition Description
C1 & A1 & A2 Input C1 always has to be activated before both muting sensors of
the first sensor pair (e.g. A1 and A2) become High.
A1 & A2 Muting applies as long as this condition is fulfilled and the
requirement mentioned above existed.
Equations and prerequisites for calculating the distance:
L
1
 v × T
IN Muting sensor
v × t > L
2
+ L
3
L
3
> L
4
T
IN Light curtain
< T
IN Muting sensor
Figure 205:
Function block diagram for
the Cross muting function
block with optional input C1
Figure 206:
Example of Cross muting
with optional input C1
Table 104:
Conditions for Cross muting
with optional input C1