Endress+Hauser Proservo NMS80 Functional Safety Manual page 15

Proservo NMS80/81/83
Endress+Hauser
Setting
• Operating mode = Output passive
• Digital input source = selected alarm block (Alarm 1 any, Alarm 2 any, Alarm 3 any or Alarm 4
any)
• Used for SIL/WHG = Enabled must be set to use this digital output as a SIL output.
Configuration method
When using the devices in process control safety systems, the device configuration must comply with
two requirements:
• Confirmation concept:
Proven, independent testing of safety-related parameters entered.
• Locking concept:
Locking of the device once configuration is complete (as required by IEC 61511-1 §11.6.4 and
NE79 §3).
To activate SIL mode, the device must run through an operating sequence, during which the device
can be operated via the device display or any Asset Management Tool (e.g. FieldCare) for which
integration is available.
"Expert mode"
A larger number of safety-related parameters can be freely configured here. This means that the
device can be adapted to difficult applications. However, the settings must be checked by directly
approaching the level in the tank or by applying a comparable method.
A tank with liquid can be used for example as a method for checking in the case of MAX monitoring.
A detailed description of the configuration steps is provided in the following section.
It is only in the case of SIL devices (ordering feature 590 "Additional Approval", option LA "SIL")
that the SIL commissioning sequence is visible on the display and in external operating tools.
For this reason, SIL locking can only be activated on these devices.
Locking in "Expert mode"
To commission the device, carry out and document the following steps in the order shown
(→  31):
Carry out configuration, see also →  13.
1.
The configuration procedure and the meaning of the individual parameters are described in
the Operating Instructions (→  7). Comply with the parameter settings in the following
table (→  17) .
Start the commissioning check and ensure that the distance between the level and reference
2.
position is at least 500 mm (19.7 in).
Navigate to: Diagnostics → Device check → Commissioning check
Commissioning check = Start (for more information, see Operating Instructions →  7).
A commissioning check is carried out. The device' s sensor calibration is checked and any
installation errors are detected.
Set Proservo to the "Level" gauge command.
3.
Navigate to: Operation → Gauge command
Gauge command = Level
Proservo returns to level mode. Depending on the tank height and the previous position of
the displacer, wait for a sufficient period of time until the displacer reaches the level surface.
Start the SIL confirmation sequence.
4.
Navigate to: Setup → Advanced setup → SIL/WHG confirmation
SIL/WHG confirmation = Set write protection and enter the relevant locking code (SIL:
7452).
Press "Next" to confirm Commissioning = Expert mode.
5.
The device checks the parameter settings in accordance with the following table (→  17)
and forces the switching of parameters if necessary.
SIL preparation = Finished is shown when the check is finished. The commissioning
sequence can be continued. Press "Next" to confirm.
15