Watlow 12LS Controller - Manual (Page 70)

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This function may be enabled or disabled per segment via the tolerance parameter. If tolerance is
OFF no guarantee of setpoint is made and the tolerance time is disregarded. If tolerance is any
value between -99 and 99, other than 0 (OFF), then the total integrated input error time (time that
the process variable is out of tolerance) is not allowed to exceed the specified alarm time for the
segment.
Disregarding triggers, a segment will run at least as long as the interval time but no longer than the
total of the interval time and tolerance time. If the input is out of tolerance for a period greater than
the entered tolerance time, the process is discontinued.
Segment End: A segment ends successfully when: the interval time period has been achieved,
and the time out of tolerance is less than max tolerance time (if a tolerance is specified), and the
associated trigger(s) for the next segment occur(s) (if any are specified).
Profile States
On any channel assigned a ramp and soak profile, the profile will be in one of five states:
START, RUN, HOLD, WAIT or TOLERANCE HOLD. Refer to TABLE 4-1 for an
explanation of loop states.
4.6.2 RAMP/SOAK FRONT PANEL DISPLAY
Press this key. |----|
¦RAMP¦
¦SOAK¦
|----|
The RAMP/SOAK key provides access to nested displays pertaining to the ramp and soak profile
assigned to the current channel.
Pressing the key from the SINGLE LOOP display enters the initial ramp and soak display. If a
profile has been assigned to the loop this display will be the PROFILE TIME display. If no profile
has yet been assigned this display will be the PROFILE SELECTION menu. After selecting a
profile the display will proceed to the PROFILE TIME display.
Pressing RAMP/SOAK from the PROFILE TIME display enters the CYCLE COUNT display.
Pressing RAMP/SOAK from the CYCLE COUNT display will enter the PROFILE OPERATION
menu.