West-control-solutions KS 92-1 Programmer manual Manuel d'utilisateur télécharger pdf (Page 68)

7.3.6 Bandwidth monitoring

Bandwidth monitoring is valid for all

program segments. An individual band

width can be determined for each pro

gram.

When leaving the bandwidth (b.Lo =

low limit; b.Hi = high limit), the pro

grammer is stopped (run LED flashes).

The program continues running when

the process value is within the prede

fined bandwidth again.

With segment type Step and bandwidth monitoring activated, the control

deviation alarm is suppressed, until the process value is in the band again.

If band alarm signalling as a relay output is required, a control deviation alarm

with the same limits as the band limits must be configured.

7.3.7 Search run at programmer start

The programmer starts the first segment at the actual process value (search run).

This may change the effective runtime of the first segment.

7.3.8 Behaviour after mains recovery or sensor error

Mains recovery

After power recovery, the last program set-points and the time elapsed so far are

not available any more. Therefore, the programmer is reset in this case. The con

troller uses the internal set-points and waits for further control commands (the

run LED blinks).

Sensor error

With a sensor error, the programmer goes to stop condition (the run LED blinks).

After removal of the sensor error, the programmer continues running.

Programmer level

Programmer description 68 KS 90-1p / KS 92-1p

time

process value x

Sp, X

StopStop

set-point profile

b.Hi

b.Lo

SP1

Pt (Gradient)

SP1

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 83 84

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West-control-solutions KS 92-1 Programmer manual Manuel d'utilisateur Page 68