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INSTRUCTION MANUAL - EUROPEAN VERSION 135369 06.03.08 69

SC22-3 Safety Controller Maintenance

8 MAINTENANCE

8.1 PREVENTIVE MAINTENANCE

8.2 SYSTEM CHECKOUT

8.2.1 Schedule of Check-outs

Verifying the configuration and proper functioning of the Safety Con-

troller includes the verification of each Safety Input and Non-Safety

Input device, along with each Output Device. As the Inputs are indi-

vidually switched from the Run state to the Stop state, the Safety Out-

puts must be checked to verify that they turn ON and OFF as

expected. Other Inputs mapped to the same Safety Outputs as the

one that is being tested, must be in their ON-state during the test.

A comprehensive test must be used to verify the operation of the

Safety Controller and the functionality of the intended configuration.

The checklist in block 8.2.2 on page 69 is generic and is intended to

assist in developing a customized (configuration-specific) checklist

for each application. This customized checklist must be made avail-

able to maintenance personnel for commissioning and periodic

check-outs. A similar, simplified daily checkout checklist should be

made for the operator (or Designated Person as specified in block

1.8.1). It is highly recommended to have copies of the Wiring Dia-

grams and Ladder Logic Diagrams and the Configuration Summary

available to assist in the checkout procedures.

8.2.2 Commissioning Checkout

A Qualified Person as specified in block 1.8.2 on Page 4 must per-

form a safety system commissioning procedure before the safe-

guarded machine application is placed into service and after each

Safety Controller configuration is created or modified.

8.2.3 Periodic (6 Monthly) Checkout

A Qualified Person as specified in block 1.8.2 on Page 4 must also

perform a safety system re-commissioning 6 monthly or at periodic

intervals based on the appropriate local or national regulations.

8.2.4 Daily Operational Checks

A Designated Person as specified in block 1.8.1 must also check the

effectiveness of the protective devices as per the device manufactur-

ers’ recommendation each day that the safeguarded machine is in

service.

8.2.5 Commissioning Checkout Procedure

For the initial part of the commissioning checkout, the Control-

ler and associated safety systems must be checked without

power being available to the guarded machine. Final interface

connections to the guarded machine cannot take place until

these systems have been checked out.

8.2.5.1 Commissioning Pre-Checks

Verify pre-checks as follows:

1) ❏ Verify power has been removed from machine, and no power

is available to machine controls or actuators.

2) ❏ Referring to figure 25 on page 69, verify that 7-pin connector is

unplugged from SC22-3 Safety Controller to ensure that Safety

Outputs SO1 (A and B), SO2 (A and B) and SO3 (A and B) are

not connected to machine.

☛ Permanent connections will be made at a later point in this

checkout.

8.2.5.2 Verifying System Operation

The commissioning checkout procedure must be performed by a

Qualified Person as specified in block 1.8.2 on Page 4 (see also

warning on page 69). It must be performed only after configuring the

Controller and after properly installing and configuring the safety sys-

tems and Safeguarding Devices connected to its Inputs (per Appen-

dix A and the appropriate standards).

The commissioning checkout procedure is performed on two occa-

sions:

• When the Controller is first installed to ensure proper installation

• Whenever any maintenance or modification is performed on the

System or on the machinery being guarded by the System, to

ensure continued proper Controller function (see

block 8.2.1 on

page 69

for a schedule of required check-outs)

PERIODIC CHECKOUTS

HE COMMISSIONING, PERIODIC AND DAILY SAFETY SYSTEM CHECKS MUST BE PER-

FORMED BY APPROPRIATE PERSONNEL AT THE APPROPRIATE TIMES (AS DE-

SCRIBED IN block 8.2.1 on page 69) IN ORDER TO ENSURE THAT THE SAFETY

SYSTEM IS OPERATING AS INTENDED. FAILURE TO PERFORM THESE CHECKS MAY

CREATE A POTENTIALLY DANGEROUS SITUATION WHICH COULD LEAD TO SERIOUS

INJURY OR DEATH.

DO NOT USE MACHINE UNTIL SYSTEM IS WORKING PROPERLY

F ALL OF THESE CHECKS CANNOT BE VERIFIED, DO NOT ATTEMPT TO USE THE

SAFETY SYSTEM THAT INCLUDES THE SC22-3 SAFETY CONTROLLER AND THE

GUARDED MACHINE UNTIL THE DEFECT OR PROBLEM HAS BEEN CORRECTED (SEE

chapter 8). A

TTEMPTS TO USE THE GUARDED MACHINE UNDER SUCH CONDITIONS

COULD RESULT IN SERIOUS BODILY INJURY OR DEATH.

BEFORE APPLYING POWER TO THE MACHINE

ERIFY THAT THE GUARDED AREA IS CLEAR OF PERSONNEL AND UNWANTED MA-

TERIALS (SUCH AS TOOLS) BEFORE APPLYING POWER TO THE GUARDED MACHINE.

AILURE TO DO SO COULD RESULT IN SERIOUS BODILY INJURY OR DEATH.

WARNING

SC22-3

Safety Controller

Power

Status

Tx/Rx

SO1

SO2

SO3

Figure 25 Safety Output Terminal Block

1 2 ... 78 79 80 81 82 83 84 85 86 87 88 ... 143 144

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