signal input switches back to 1 first and then returns to 0, the muting cycle is once
again stopped and the
Override required
output switches to 1 if the remaining conditions
for the
Override required
output are met.
While there is a valid override status, none of the following are performed for the
duration of one override cycle: direction detection, sequence monitoring (depending on
function block) and concurrence monitoring.
7.6.2.7.5
Input Band signal
Input Band signal
If the transported material stops moving during the muting cycle, the total muting
time and other parameters that can lead to muting errors could be exceeded. This
problem can be avoided by using the
Band signal
input. This input allows you to stop
the time-dependent functions associated with muting if the material being transported
comes to a halt.
•
Band signal
input is 0: conveyor system stopped
•
Band signal
input is 1: conveyor system running
The following timer functions are affected by the
Band signal
input:
Table 121: Effect of the Band signal input
Timer function
Effect of the Band signal input
Monitoring of the total mut‐
ing time
•
The detection of a conveyor system stoppage pauses the timer
functions.
•
When the conveyor system starts up again, the timer continues
running with the value that was stored before the stoppage
was detected. When this happens for the first time, a one-time
increase of 5 seconds is added onto the total muting time.
Concurrence monitoring
Complementary information
The
Suppression of sensor signal gaps
parameter is not affected by the
Band signal
input.
7.6.2.7.6
Output Muting error
Output Muting error
The
Muting error
output indicates when an error associated with the muting function
block has been detected. The
Muting error
output = 1 if the
ESPE
input = 0 and any
muting error has been detected and not yet reset.
Table 122: Error statuses and reset information for muting function blocks
Output Muting error
Resetting the error status
Comments
•
Total muting time moni‐
toring error
•
Concurrence monitoring
error
•
Direction detection error
•
Sequence monitoring
error
•
Error with transition from
Stop status to Run status
Before a muting error of any kind can be
reset, a valid muting cycle must be per‐
formed in full. This either involves using
the Override function, or all of the muting
sensor signal inputs must be set to 1 and
the
ESPE
input must be set to 0. A valid
muting sequence must follow this.
When either of these conditions is met, the
Muting error output returns to 0 provided
that there is no other error pending.
The
Enable
output
and the
Status
out‐
put switch to 0 if
the
Muting error
out‐
put is set to 1.
Complementary information
If the
ESPE
input = 1, the display of muting errors at the
Muting error
output is sup‐
pressed.
CONFIGURATION
7
8024589/2020-11-10 | SICK
O P E R A T I N G I N S T R U C T I O N S | Flexi Compact
103
Subject to change without notice