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Evaluation unit monitoring
To achieve full system integrity the evaluation unit must continuously monitor the error condition
of the RESOLUTE Functional Safety Siemens DRIVE-CLiQ encoder system and in the case of
fault detection, place the system into a safe state within the process safety time.
NOTES:
•
The evaluation unit must have its Functional Safety functions enabled (as often it is a
configuration parameter to turn on Functional Safety functionality) and must respond
correctly to a RESOLUTE Functional Safety Siemens DRIVE-CLiQ encoder system
position error flag.
•
A persistent fault condition may indicate a hardware failure of the RESOLUTE
Functional Safety Siemens DRIVE-CLiQ encoder system or an installation problem.
Storage and handling
DO ensure that protection is provided for the scale, readhead and interfaces when transporting a
machine with that equipment already installed.
DO store scale in a cool dry place out of direct sunlight and in it's original packaging prior to
installation. When stored on a reel ensure that the backing tape is facing out.
DO allow scale to acclimatize to installation environment prior to installation.
DO store at < 95% RH
DO operate at < 80% RH
DO install between 15 °C and 25 °C
DO store between −20 °C and +80 °C
DO operate between 0 °C and +80 °C (readhead and scale), 0 °C and +55 °C (interface)
14
RESOLUTE™ Functional Safety Installation guide and safety manual Siemens DRIVE-CLiQ encoder system
Maintenance and cleaning
In order to retain full Functional Safety compliance, this encoder system needs to be maintained
appropriately. The maintenance check intervals will be defined by the machine builder/installer
according to their risk assessment. There are no user serviceable parts within the readhead
or interface. The lid of the readhead must not be removed as it will break the seal.
The following checks should be carried out:
•
Check the readhead to bracket screws are correctly tightened.
•
Check for worn or damaged cable connecting the readhead to the interface.
•
Check that the scale has not been damaged or contaminated. If required, clean the system
using approved solvents (see
'Storage and handling'
NOTES:
•
Do not re-tighten the screws securing the encoder ring as this will change the ring settings.
•
Do not attempt to move the linear scale as this will damage the adhesive bond.
When cleaning the system:
DO use Renishaw (A-9523-4040) alcohol wetted scale wipes to clean the readhead optics and
scale, available from your local Renishaw representative.
Or use a clean, dry, lint-free cloth.
Or use only the following solvents sparingly with a wetted lint-free cloth:
•
Propan-2-ol (iso-propyl alcohol) CH
•
n-Heptane CH
(CH
)
CH
3
2
5
3
DO NOT use the following aggressive solvents to clean the RESOLUTE Functional Safety
Siemens DRIVE-CLiQ readhead, DRIVE-CLiQ interface, RTLA30-S and RTLA30 scales, or the
FASTRACK carrier:
•
Acetone CH
COCH
3
3
•
Chlorinated solvents
•
Methylated spirits
on page 19).
CHOHCH
3
3
Original instructions
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