Watlow CLS200, Руководство пользователя

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CLS200 Series User’s Guide
Chapter 6: Ramp/Soak
123
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 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 logic applies:
Table 6.2
—
Trigger Latch Logic
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.
This parameter appears only if you answered
YES
to EDIT SEG TRGGRS?
ALARM
A SEG01 TR1 DI08
TRIG? UNLATCHED
Selectable values: LATCHED or UNLATCHED .
Segment Tolerance
Set a positive or negative tolerance value for each segment. Tolerance works as shown in
Figure 6.3
.
Positive Tolerance Value
Negative Tolerance Value
Out of Tolerance
Within Tolerance
Setpoint
Out of Tolerance
Within Tolerance
Setpoint
Tolerance
Setting
}
Tolerance
Setting
}
Figure 6.3
— Positive and Negative Tolerances
If you enter a positive tolerance, the process is out of tolerance when the process variable goes
above the setpoint plus the tolerance.
If you enter a negative tolerance, the process goes out of tolerance when the process variable goes
below the setpoint minus the tolerance.
ALARM
A SEGMENT 01
SEG TOLERNCE? OFF
Selectable values: -99 to 99 , or OFF (no tolerance limit). See Setpoints and Tolerances for Various
Input Types on page 124 .