Endress+Hauser Cerabar S PMC71, Functional Safety Manual

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Cerabar S PMP71 Operation
Hauser 29
Parameter and menu path Permitted setting
• ALARM DELAY (336)
3)
• ALARM DISPL. TIME (480)
3)
Menu path:
(GROUP SELECTION →) OPERATING MENU → DIAGNOSIS
MESSAGES
• 0.0 s
• 0.0 s
SIMULATION (413)
Menu path:
(GROUP SELECTION →) OPERATING MENU → SIMULATION SIMULATION = None
5)
1) Only from firmware version ≥02.20
2) Not for options with a measuring range, e.g. 16/250 bar [2320/3625 psi]
3) For firmware versions ≤02.20.04, settings are reset to the default values once the SIL password is entered.
4) For firmware versions ≤02.20.04, the "Min. alarm" setting is only possible with the "Standard configuration"
method.
5) With the "Increased security during parameter entry" method, any simulation running is terminated
automatically once the correct password has been entered.
• If the device is in a fault state, i.e. an alarm is output and the current output adopts
the set value, the cause of the fault must first be eliminated.
• If operating via the DTM, it is only possible to lock via the SAFETY LOCK menu in
the online mode.
• The sensor can only be recalibrated by Hauser Service. All parameters,
except the parameters for a sensor recalibration, are reset by the "7864" reset code.
Therefore, the parameters have to be checked prior to locking via the SAFETY
CONFIRM. menu.
4.6.4 Check
L
CAUTION
A change to the measuring system or parameters can affect the safety function.
‣
Once all of the parameters have been entered, the safety function must be checked
before performing the locking sequence! This can be done, for example, via the
"Simulation" parameter or by approaching the limit pressure (see the parameter
description for "Simulation" in the associated Operating Instructions).
‣
When the device is part of a safety function, the entire safety function must be checked
following any change to the device, e.g. a change in the orientation of the device or the
parameter configuration.
5 Operation
5.1 Device behavior during power-up
Once switched on, the device runs through a diagnostic phase of approx. 30 s. During this
time, the current output is first set to approx. 12 mA, then to 4 mA, before the current
that is output actually corresponds to the current measured value. Communication via
HART is not possible during the diagnostic phase.
5.2 Behavior of device in the event of an alarm and
warnings
The output current on alarm can be set to a value of ≤ 3.6 mA or ≥ 21 mA.