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5 Functional safety (SIL)
SOLITRAC 31 • Four-wire 4 … 20 mA/HART
62085-EN-211203
according to IEC 61508 and IEC 61511. Take note of the specifica-
tions in the Safety Manual.
The following inputs/outputs are permitted:
•
Relay output
•
4 … 20 mA current output
5.4 Safety concept of the parameterization
The following tools are permitted for parameterization of the safety
function:
•
The integrated display and adjustment unit for on-site adjustment
•
The DTM suitable for the device in conjunction with an adjustment
software according to the FDT/DTM standard, e. g. PACTware
Note:
For operation of the SOLITRAC 31 an actual DTM Collection is re-
quired. The modification of safety-relevant parameters is only possible
with active connection to the instrument (online mode).
To avoid possible errors during parameter adjustment in a non-safe
user environment, a verification procedure is used that makes it pos-
sible to detect parameter adjustment errors reliably. For this, safety-
relevant parameters must be verified after they are stored in the
device. In normal operating condition, the instrument is also locked
against parameter changes through unauthorized access.
To prevent unintentional or unauthorized adjustment, the set param-
eters must be protected from unauthorized access. For this reason
the instrument is shipped in locked condition. The PIN in delivery
status is "0000".
When shipped with a specific parameter adjustment, the instruments
are accompanied by a list with the values deviating from the basic
setting.
All safety-relevant parameters must be verified after a change.
The parameter settings of the measurement loop must be document-
ed. You can find a list of all safety-relevant parameters in the delivery
status in chapter "
Setup with the display and adjustment module
" un-
der "
Additional adjustments - Reset
". In addition, a list of the safety-
relevant parameters can be stored and printed via PACTware/DTM.
For each parameter change, the instrument must be unlocked via a
PIN (see chapter "
Parameter adjustment, setup steps - Lock adjust-
ment
"). The device status is indicated in the DTM by the symbol of an
unlocked or locked padlock.
In delivery status, the PIN is
0000
.
Warning:
If adjustment is enabled, the safety function must be considered
as unreliable. This applies until the parameterisation is terminated
correctly. If necessary, other measures must be taken to maintain the
safety function.
Tool for operation and
parameterization
Safe parameterization
Safety-relevant param-
eters
Unlock adjustment
Unsafe device
status
