Siemens SIPART PS2 6DR50xx Instrucciones de operaciones descargar pdf (Pagina 191)

Alarm, error, and system messages

11.3 Online diagnostics

SIPART PS2 with and without HART communications

Operating Instructions, 09/2007, A5E00074631-07

191

at the time of initialization. The activation of "down tight closing" ("YCLS" parameter) is

therefore the condition.

Example: A value of 3% is set. The position is normally adopted for "down tight closing". A

fault is reported if a value > 3% or < -3% is determined instead.

The fault message remains activated until either a subsequent monitoring remains within the

tolerance or a re-initialization process is executed. Even the deactivation of monitoring

("F.

ZERO"=OFF) may trigger a fault message.

This monitoring function does not deliver any utilizable results if the end stops were not

determined automatically at the time of initialization, but the limits were set manually (manual

initialization, "5.INITM").

A similar diagnostics is carried out for the upper hard end stop. The "G.

OPEN" parameter is

used to set the limit for this. The activation of "up tight closing" ("YCLS" parameter) is

therefore the condition.

8 Monitoring of dead zone adjustment

If the dead zone increases disproportionately when adjusting it automatically ("DEBA"=Auto

parameter), it indicates an error in the system (e.g. severely increased packing gland friction,

play in the position displacement sensor, leakage). A limit can therefore be entered for this

value ("E1.LEVL3", threshold for dead zone monitoring). A fault message output is activated

when this value is exceeded.

9 Partial stroke test exceeds the reference step time

On the one hand, this fault message appears when a manual or cyclic partial stroke test is

initiated and the test cannot be started since the valve is not within the start tolerance. On

the other hand, this fault message appears when one of the three thresholds of the partial

stroke test that are determined from the "A6.PSTIN" reference step time multiplied by factors

"A7.FACT1" to "A9.FACT3" is violated. The degree of the fault message is shown in the

number of columns on the digital display. The degree of the fault message is simultaneously

displayed using the fault message output or alarm outputs depending on the mode of the

advanced diagnostics.

10 General control valve fault

The monitoring of the operational response responds when the actual valve position shifts

from a narrow corridor between the reference variable and the expected position course. In

this case, the deviation between the expected and actual position course is filtered,

displayed and compared with the set thresholds that are determined from the "b2.LIMIT" limit

multiplied by the factors "b3.FACT1" to "b5.FACT3".

11 Pneumatic leakage

This fault message appears when the leakage indicator exceeds the set thresholds. Keep in

mind that the complete sensitivity of this function can be used only if a ramp movement was

initiated after initialization to set the leakage indicator (see explanations for "C1.LIMIT").

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Siemens SIPART PS2 6DR50xx Instrucciones de operaciones Pagina 191

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Siemens SIPART PS2 6DR50xx Instrucciones de operaciones Pagina 191

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