Watlow CLS200 - Segment Tolerance

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.