Manual

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A8-11

IM 01C25R03-01E

 Start of Sampling

The sampling of reference value is carried out

for 180 seconds, which is the default value set to

DIAG_PERIOD.

1) Conrm that the sampling period

(DIAG_PERIOD) is set to 180 seconds.

2) Set “Reference” to DIAG_MODE.

The sampling starts soon after the setting.

IMPORTANT

• For the each parameter, the one value is

given. If “Reference” is set to DIAG_MODE

again, the value is updated and overwritten.

• If the power supply is shut down during the

sampling, DIAG_MODE becomes “Stop”.

Set “Reference” to DIAG_MODE in order to

carry out the sampling again.

 End of Sampling

After about 180 seconds, the sampling

automatically nishes. The “Reference” setting

of DIAG_MODE changes automatically to

“Calculation” and the termination time is recorded to

REFERENCE_TIME.

1) Conrm that the setting of DIAG_MODE

changes to “Calculation”.

2) Check the termination time recorded into

REFERENCE_TIME.

 Reference Values

Conrm the latest values are obtained into the

following parameters.

• REFERENCE_FDP

• REFERENCE_FSPL

• REFERENCE_FSPH

• REFERENCE_BLKF

• REFERENCE_DPAVG

 Invalid Ref BlkF, fSPh, fSPl, or fDP

When the enough reference uctuation value is not

obtained, an alarm of Invalid Reference value for

each parameter is generated and also the part of

ILBD function related to the Invalid Ref BlkF, fSPh,

fSPl, or fDP is not carried out.

Conrm the alarm of Invalid Ref BlkF, fSPh, fSPl, or

fDP is not displayed in DIAG_ERR.

If an alarm of Invalid Reference value is generated,

consider the process condition or obtain the

reference uctuation values again.

NOTE

Even if an alarm of Invalid Ref BlkF, fSPh, fSPl,

or fDP is generated, “Calculation” in DIAG_

MODE is kept.

A8.2.8 Capability Test of Blockage

Detection Operation

Before performing the ILBD operation, check the

capability of the blockage detection operation.

The simulation test is performed by closing motion

of a three-valve manifold or stop valve. When

simulated blockage occurs, conrm that an alarm is

generated.

NOTE

The uctuation amplitude of atmospheric

pressure is nearly zero with pressure or level

measurement. In such case, simulate the

blockage detection by closing the valve where

the uctuation existed.

 Simulation of High-pressure-side

Blockage

1) Close the high-pressure-side valve.

2) Conrm the value of PRIMARY_VALUE is

stable. If unstable, open valve a little.

3) Set “Calculation” to DIAG_MODE so as to start

blockage detection operation.

4) Check that an alarm of “High Side Blocking” is

generated after the time that consists of DIAG_

PERIOD and DIAG_COUNT passed.

5) Check also the operation of the analog alert if

an analog alert is set.

6) Open the valve completely and check that there

are no alarms.

 Simulation of Low-pressure-side