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Figure 30 NAMUR Icons
The definition of these Status Signals is as follows:
Failure
Output signal invalid due to malfunction in the field device or its peripherals.
Check Function:
Output signal temporarily invalid (e.g. frozen) due to ongoing work on the device.
Out of specification:
Deviations from the permissible ambient or process conditions determined by the device
itself through self-monitoring or faults in the device itself indicate that the measuring
un-certainty of sensors or deviations from the set value in actuators is probably greater
than expected under operating conditions.
Maintenance required:
Although the output signal is valid, the wear reserve is nearly exhausted or a function will
soon be restricted due to operational conditions
4.3.3 Pushbutton Locks and Configuration-Lock Jumper
Before performing any of these functions with the local display you must first ensure that
the pushbuttons are placed in the unlocked mode using SVI3 DTM. The positioner ships in
the unlocked mode. See SVI3 DTM Manual for more details.
The SVI3 offers several levels of plant security
.
It may be desirable
,
after initial setup, to
lock the pushbuttons so that the SVI3 parameters cannot be inadvertently changed by the
buttons. Several levels of software modifiable pushbutton locks are provided.
Table 7: Pushbutton Lock Security Level
Level
Access
Security Level 3
Allow Local Buttons: Buttons on the SVI3 are fully enabled.
Failure
?
Check
Function
Out of
Specification
Maintenance
Required
