Watlow CLS200 Manual de usuario descargar pdf (Pagina 159)

CLS200 Series User’s Guide Chapter 7: Ramp/Soak

Doc.# 0600-3050-2000 Watlow Anafaze 143

Trigger Latch Status

Choose whether the trigger is latched or unlatched.

• A latched trigger is checked once, at the beginning of a

segment.

• An unlatched trigger is checked constantly while a

segment is running. If an unlatched trigger becomes

false, the segment timer stops and the loop goes into

trigger wait state.

When using two triggers with a segment, the following log-

ic applies:

Table 7.2 Trigger Latch Logic

This parameter appears only if you answered YES to EDIT

SEG TRGGRS?

Selectable values: LATCHED or UNLATCHED.

Segment Tolerance

Set a positive or negative tolerance value for each segment.

Tolerance works as shown in Figure 7.3.

Figure 7.3 Positive and Negative Tolerances

If you enter a positive tolerance, the process is out of toler-

ance when the process variable goes above the setpoint

plus the tolerance.

Trigger Settings Trigger Logic

Both Triggers Latched ORed Trigger starts a segment

Both Triggers Unlatched ANDed Triggers start/continue a segment

One Trigger Latched,

One Trigger Unlatched

• The unlatched trigger starts/continues a segment.

• The latched trigger has no effect.

ALARM

A SEG01 TR1 DI08

TRIG? UNLATCHED

Positive Tolerance Value

Negative Tolerance Value

Out of Tolerance

Within Tolerance

Setpoint

Out of Tolerance

Within Tolerance

Setpoint

Tolerance

Setting

}

Tolerance

Setting

}

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