Watlow CLS200 - Manual (Page 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
}