ABB AC500-S Safety User Manual page 266
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Also See for AC500-S:
- Safety user manual (452 pages) ,
- Application note (24 pages) ,
- System manual (119 pages)
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Configuration and programming
AC500-S libraries > SafetyBlocks_PLCopen_AC500_v22.lib
Muting is the intended suppression of the safety function. In this FB, parallel muting with two
muting sensors is specified.
Muting is the intended suppression of the safety function. This is required, e.g., when trans-
porting the material into the danger zone without causing the machine to stop. Muting is trig-
gered by muting sensors. The use of two muting sensors and correct integration into the pro-
duction sequence must ensure that no persons enter the danger zone while the light curtain is
muted. Muting sensors can be push buttons, proximity switches, photoelectric barriers, limit
switches, etc. which do not have to be fail-safe. Active muting mode must be indicated by indi-
cator lights.
There are sequential and parallel muting procedures. In this FB, parallel muting with two muting
sensors was used; an explanation is provided below. The positioning of the sensors should be
as described in Annex F.7 of IEC 62046, 2005
reflecting light barriers" on page 268. The FB can be used in both directions, forward and back-
ward. However, the actual direction cannot be identified. The muting should be enabled with the
MutingEnable signal by the process control to avoid manipulation.
The FB input parameters include the signals of the two muting sensors (S_MutingSwitch11 and
S_MutingSwitch12), the OSSD signal from the AOPD device (S_AOPD_In) as well as two
parameterizable times (DiscTimeEntry and MaxMutingTime).
The S_StartReset input shall only be activated if it is ensured that no hazardous situation can
occur when the PES is started.
Table 57: FB name: SF_MutingPar_2Sensor
Name
Data type
VAR_INPUT
Activate
BOOL
S_AOPD_In
BOOL
S_MutingSwitch11
BOOL
S_MutingSwitch12
BOOL
266
Initial value
Description, parameter values
Ä Table 16 "General input parameters" on page 192
FALSE
FALSE
Variable.
OSSD signal from AOPD.
FALSE: Protection field interrupted.
TRUE: Protection field not interrupted.
FALSE
Variable.
Status of Muting sensor 11.
FALSE: Muting sensor 11 not actuated.
TRUE: Workpiece actuates muting sensor 11.
FALSE
Variable.
Status of Muting sensor 12.
FALSE: Muting sensor 12 not actuated.
TRUE: Workpiece actuates muting sensor 12.
3ADR025091M0208, 12, en_US
Ä "Example for SF_MutingPar_2Sensor with two
2020/06/19
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