KEYENCE SL-VHS Series - Manual (Page 9)

9 SL-VHS-IM-E
You are fully responsible for performing the risk assessment on your machine application, taking into
account performing maintenance and inspections, which are critical factor for appropriate risk
assessment. In addition, it is a responsibility for the responsible personnel to train the machine oper-
ators regarding inspection and maintenance of the machine and the SL-VHS.
■ Inspection before operation (Initial inspection)
When the installation of the SL-VHS is completed, the responsible personnel must verify the operation of
the SL-VHS in accordance with the checklist shown below. Note that the following inspection items
comprise only a bare minimum inspection. KEYENCE Corporation strongly recommends including the
necessary checking items into this checklist based on the judgment of the responsible personnel since
additional criteria may be necessary depending on both the machine to which the SL-VHS is installed
and the laws, rules, regulations and standards in the country or region in which the SL-VHS is used/
installed.
(1) Pre-check for installation condition
❑
The machine on which the SL-VHS is installed can be caused to stop running by the OFF-state of OSSD.
❑
The SL-VHS is installed so that the machine operator cannot go into or approach the hazardous
zone or hazard without passing through the detection zone.
❑
The device to activate the override is installed so that it cannot be operated if there are any per-
sonnel within the hazardous zone.
❑
The SL-VHS has been installed at a distance greater than or equal to the minimum safety distance
required.
❑
If there are glossy surfaces nearby, move them so that they are beyond the minimum installation
distance.
❑
The SL-VHS is installed at a location free from light interference, for example fluorescent lamps.
❑
The transmitters and receivers are paired correctly.
❑
The beam axis spacing (detection capability) is the same between the transmitter and the
receiver when installing the SL-VHS.
❑
The muting devices fulfill the conditions specified in this instruction manual and the requirements of the laws,
rules, regulations and standards in the country or region in which the SL-VHS and those devices are used.
❑
The devices used to activate the override fulfill the conditions specified in this manual and
requirements of the laws, rules, regulations and standards in the country or region in which the
SL-VHS and those devices are used.
❑
Risk assessment was performed on your own responsibility based on your machine application,
and then the installation of SL-V was also based on its result.
(2) Pre-check for wiring
❑
The SL-VHS power supply is 24 VDC, fulfill the conditions for the power supply as specified in this
instruction manual.
❑
The transmitter and receiver cables are installed correctly.
❑
The two of OSSD outputs provided in the SL-VHS are both used as a safety-related machine control sys-
tem.
❑
The polarity is not reversed with the connection to the power supply.
❑
In case of using PNP output type cable, the OSSD is not short-circuited to +24 V, and the load is
between the OSSD and 0 V.
❑
In case of using NPN output type cable, the OSSD is not short-circuited to 0 V, and the load is
between the OSSD and +24 V.
❑
When two or more SL-VHS are connected in series, they are connected using the dedicated
series connection cable, which is not cut or extended.
❑
Alert output, AUX output, Clear/Blocked Output, and state information output are not used as
safety output for safety systems.
❑
The cable sheaths are not damaged. The protection against the disconnection or short-circuit of
cable, which might be caused by crushing or being caught in a machine, is taken into account.
❑
If two or more sets of the SL-VHS units are used in the vicinity of each other, the protection measures
against light interference is done through a series connection method or light interference prevention
method.
❑
All of NON-SAFETY-RELATED functions described in this instruction manual are not a part of /
whole of safety-related machine control system.
(3) Pre-check test while the machine is stopped.
You should do the following pre-check test with the test piece in order to make sure the operation of
the SL-VHS while the machine is stopped.
❑
The OSSD indicator on the SL-VHS lights in red and the OSSD turns OFF while the test piece is
present in the detection zone. The following figure shows the movement procedure of the test piece.
❑
The OSSD indicator and all bar LEDS light in green if no test piece is present in the detection zone.
❑
When the EDM function is applied, the SL-VHS goes to a lockout condition and the OSSD indicator on
the SL-VHS lights in red if the EDM input opens while the test piece is present in the detection zone.
(4) Pre-check test while the machine is operating.
The purpose of this pre-check test is to make sure that the machine (hazards) stops its operation.
This test must be done after you completely make sure that there is nobody in the hazardous zone.
❑
The machine stops if the test piece is present in the detection zone. It is recommended to try
three locations of test piece: near the transmitter, near the receiver, and in the central area of the
detection zone.
❑
The machine (hazard) still stops its operation as long as the test piece is present in the specified
detection zone. This test should be done for the whole detection zone.
❑
The machine (hazard) stops its operation when the power for the SL-VHS is disconnected.
❑
Minimum safety distance is ensured, which has been calculated according to the laws, regula-
tions, and standards of the country and region in which the SL-VHS is installed.
■ Inspection prior to daily operation (Daily inspection)
You should check the SL-VHS operation and the machine operation according to the following check-
list prior to daily operation.
Note that the following inspection items comprise only a bare minimum inspection. KEYENCE Corpo-
ration strongly recommends including the necessary checking items into this checklist based on the
judgment of the responsible personnel since additional criteria may be necessary depending on both
the machine to which the SL-VHS is installed and the laws, rules, regulations and standards in the
country or region in which the SL-VHS is used/installed.
Also, the responsible personnel has a responsibility to instruct the machine operators about the
inspection and maintenance of the machine and the SL-VHS.
The result of this inspection must be kept on record along with the machine log.
(1) Pre-check for installation condition
❑
The SL-VHS is installed so that the machine operator cannot go into or approach the hazardous
zone or hazard without passing through the detection zone.
❑
The SL-VHS has been installed at a distance greater than or equal to the minimum safety distance
required.
❑
The SL-VHS is installed at a location free from light interference, for example fluorescent lamps.
❑
The cable sheaths are not damaged. The protection against the disconnection or short-circuit of
cable, which might be caused by crushing or being caught in a machine, is taken into account.
Additionally, you should perform the following inspections as described in "Inspection before
operation".
(3) Pre-check test while the machine is stopped
(4) Pre-check test while the machine is operating
❑
There is no change of installation that would influence the result of your original risk assessment.
■
Regular (periodical) inspection
The responsible personnel must perform a regular inspection at least once every six months.
Note that the following inspection items comprise only a bare minimum inspection. KEYENCE Corpo-
ration strongly recommends including the necessary checking items into this checklist based on the
judgment of the responsible personnel since additional criteria may be necessary depending on both
the machine to which the SL-VHS is installed and the laws, rules, regulations and standards in the
country or region in which the SL-VHS is used/installed.
The result of this inspection must be kept on record along with the machine log.
(1) Additional inspection items
❑
The actual distance between the hazardous zone or hazards and the SL-VHS still keeps greater
than the calculated safety distance.
❑
The stop time of the machine connected to the SL-VHS has not increased.
❑
There are no loose screws in the mounting bracket.
❑
The unit connection cable or the series connection cable is fastened tightly to the SL-VHS with no
loose screws.
❑
The OSSD is connected correctly to the machine.
❑
There is no damage to the SL-VHS that may influence IP65 structure.
❑
The surface of the SL-VHS is not polluted or damaged.
❑
Beam axes must be aligned. If it is out of alignment, adjust the beam axes to be aligned.
❑
There is no change of installation that would influence the result of your original risk assessment.
Checklist
Star t
Stop