Override Function - Panasonic SF4C Series Instruction Manual

Functions

3-9 Override Function

● Incorrect using of the muting control may cause any accident. Please understand the muting control
fully, and use it. As for the muting control, the following international standards define the require-
ments.
ISO 13849-1 (EN ISO 13849-1, JIS B 9705-1):
"Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design,
Article 5.2.5 Muting"
IEC 61496-1 (ANS/UL 61496, JIS B 9704-1):
"Safety of machinery - Electro sensitive protective equipment - Part 1: General requirements and
tests, Annex A, A.7 Muting"
IEC 60204-1 (JIS B 9960-1):
"Safety of machinery - Electrical equipment of machines - Part 1: General requirements, 9.2.4 Over-
riding safeguards"
IEC / TS 62046:
"Safety of machinery - Application of protective equipment to detect the presence of persons"
EN 415-4:
"Safety of packaging machines - Part 4: Palletizers and depalletizers, Annex A, A2.2 Muting"
ANSI B11.19-1990:
"for Machine Tools-Safeguarding When Referenced by the Other B11 Machine Tool Safety Stan-
dards-Performance Criteria for the Design, Construction, Care, and Operation" 4.2.3 Presence-
Sensing Devices: Electro-Optical and Radio Frequency (R.F.)
ANSI/RIA R15.06-1999:
"for Industrial Robots and Robot Systems - Safety Requirements, 10.4.5 Muting"
● Use the muting control while the machine cycle is not in danger mode. Maintain safety with the other
measure while the muting control is activating.
● For the application that the muting control is activated when a sensing object passes through the
sensor, place the muting sensor so that the conditions for the muting control cannot be satisfied by
intrusion of personnel when the sensing object is passing through the sensor or the sensing object is
not passing through it.
● The muting lamp should be installed in a position where it can always be seen by operators who set
or adjust the machine.
● Be sure to check the operation of the muting function before its use. Furthermore, check the state of
the muting lamp (cleanliness or brightness etc.)
The override function forcibly turns the safety function into invalid. This function is used for the following cas-
es: when the control output (OSSD 1 / 2) is OFF status during using muting function, when the muting sensor
is turned ON at the starting of line and when starting the machine is desired.
The override function becomes valid when all the conditions listed below are satisfied:
● The safety output 1 / 2 shall be ON.
● The signal shall be input to either muting input 1 or 2, or to both of the inputs.
● The override input shall be connected to +V (0V when using NPN output), and the test input / reset input
shall be opened (3 sec. continuously).
● The incandescent lamp with 1.5 to 6W shall be connected to the muting lamp output.
(The muting lamp diagnosis function is invalid at the time of factory setting.) (Note 1)
If one of the four conditions above becomes invalid or timing exceeds 60 sec. (Note 2), the override function
becomes invalid.
Notes: 1) The muting lamp diagnosis function can be set with the handy controller SFC-HC (optional).
If the muting lamp diagnosis function is set to be invalid, the override function is maintained even if a lamp blows or a lamp is
not connected.
2) By using the handy controller SFC-HC (optional), the timing can be changed in units of 1 sec. in the range of 1 to 600 sec.
3) The override function operates only when the auto reset is ON (the interlock is invalid).
● Make sure manually to operate system for starting override function. Furthermore, the system shall
be placed in area where all over the dangerous zone shall be comprehend and out side of the dan-
gerous zone.
● Using override function, make sure that there exist no operator in the dangerous zone, which may
result in death or serious injury.
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