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2 Operational safety User manual SIPLACE SX1/SX2 2.11 Lock out and tag out procedure From software version SC 706.1 SP1 Version 10/2014 88 Lock out the machine . – Attach a lock whene ver possible (e.g . to the motor c…
User manual SIPLACE SX1/SX2 2 Operational safety
From software version SC 706.1 SP1 Version 10/2014 2.11 Lock out and tag out procedure
87
2.10.3 Compressed air conditions in the machine after switching off at the main-
power switch
When you switch off the main switch (item 1 in fig. 2.10 - 1, page 83) or if the power supply to the
machine fails, the electrically controlled main valve of the compressed air unit (item 1 in fig. 2.9 -
1, page 82 ). The pressure will drop to 0 MPa (0 bar) within 5 seconds.
2.11 Lock out and tag out procedure
2.11.1 Purpose and scope
Before performing any preventive maintenance work or service work, a procedure of locking and
tagging must be followed. The procedure, when followed correctly eliminates the possibility of an
employee being injured.
2
2.11.2 Description
Whenever it becomes necessary to isolate, control and release energy, the following procedure is
to be followed
Notify affected employees.
Shut down the equipment. Carry out all normal stopping procedures:
– Press the stop button.
– Shut down the control computer.
– Switch the machine off at the main power switch.
Isolate the machine from all its energy sources:
– Shut off the compressed air supply
– Shut off the main power supply
PLEASE NOTE
Minimum requirements
These procedures represent the minimum lock/tag out requirements for the preventive
maintenance or service work. Any additional safeguards needed to complete work safely
can be specified by facilities supervision, the safety officer, the safety committee and the
health department.
2 Operational safety User manual SIPLACE SX1/SX2
2.11 Lock out and tag out procedure From software version SC 706.1 SP1 Version 10/2014
88
Lock out the machine.
– Attach a lock whenever possible (e.g. to the motor contactor).
2
Fig. 2.11 - 1 Position of the motor contactor
2
(1) Power supply
(2) Motor contactor
Alternatively: tag out procedure
If a machine can be locked out, it must be. However, there are situations where energy iso-
lating devices cannot accommodate locks. In these cases, the energy isolating devices must
be tagged to warn employees that the machine is de-energized for servicing. The tag must
be securely fastened, it must be placed in a position visible to all and it may only be removed
by the person who attached it. 2
(2)
(1)
User manual SIPLACE SX1/SX2 2 Operational safety
From software version SC 706.1 SP1 Version 10/2014 2.11 Lock out and tag out procedure
89
Release stored energy
Stored energy in the compressed air supply or electrical energy in electrolytic capacitors must
be released by appropriate means. 2
After switching off the machine, wait the specified discharge or pressure unloading time
(see sections 2.8
, page 78, and 2.9, page 81), before the machine can be operated again
without risk.
Verify the lock out.
Testing the lock out can be done simply by pressing the start button.
The following steps must be taken to restore the machine to operation.
Check the area. Authorized employees should remove all of their tools and reinstall all
guards.
Notify all affected employees.
Before removing even one lock or tag, inform all workers in the area that the machine is going
to be restarted.
Remove locks/tags
Each authorized employee must remove his or her own lock. Each authorized employee will
have his or her own lock.
Turn the machine on. Authorized workers should observe the equipment in operation to in-
sure repairs were done correctly.
2.11.3 Testing
Service personnel may test the circuits by activating them briefly without canceling the locking
method. This may be done only when no other work is being performed by any other person on
the equipment being tested.
It is extremely important that all remote start switches be tagged with the Do Not Operate tag to
prevent inadvertent operation of the equipment during these periods.
2.11.4 Responsibility and obligations
– It shall be the responsibility of the maintenance and service personnel to make sure this pro-
cedure is adhered to.
– It shall be the responsibility of the maintenance and service personnel’s immediate supervisor
to instruct his personnel on this procedure.
– It shall be the responsibility of the Safety Officer with assistance from the Safety Committee,
Health Service Department, and the various managers and Vice-presidents to administer the
Lock Out / Tag Out Procedure.