Future Design MCTB 4.3, Руководство пользователя

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MCTB
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When the alarm is locked, the
“Alarm Message” description will be replaced with “(Locked)”. Pressing alarm
set point entry field will display a dialog indicating that the field is locked. In order to unlock a limit alarm set
point press and hold the alarm set point field. After appr
oximately 4 seconds, the “(Locked)” descriptor will be
replaced with the standard “Alarm Message” text. When this occurs, stop pressing on the screen and the
numeric keypad will be shown. A new alarm set point can then be entered.
After a period of 1 minute (if no further edits are made to limit alarm set points) or upon leaving the Alarm
screen, the limit set points will automatically be relocked. The process will then have to be repeated to make
another change.
9.3 Setpoint Limits
The set point Limit screen allows for the adjustment of the minimum and maximum operating set points allowed
to be entered for the control loops. These limits can be used to prevent operators from entering a value that
exceeds the survivability limits of equipment or product being manufactured, reducing the risk of property
damage.
Enter the desired se
t point limits by touching the “Lower Limit” and “Upper Limit” entry fields and enter the
desired values using the numeric keypad.
IMPORTANT: The operation of automatic ramp/soak programs is limited by the lower and upper limits. If a
program was created or imported from another MCTB system with set points that exceed the
current lower and/or upper limits, when the program is run, the program step set points will be
coerced to the lower or upper limit that it exceeds. This protects the equipment or product
being manufactured from being subjected to values that exceed current set point limits.