EZT-570S User Manual
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6. Why is the program not coming out of a Wait?
When a “wait for” condition is applied to a step, the step will not begin until the wait for condition is
met. If the wait for condition is an input to the EZT-570S, the input must reach and/or exceed the wait
for set point. If the input does not reach the set point, the step will not continue.
When using a wait for to initiate a soak time, be sure to place the wait for condition on the soak step.
If the wait condition is applied to the ramp step, the program will not continue because the set point
will not change until the wait for condition is met, i.e., the ramp cannot take place until the step is
executed. Since the set point does not change, the input will not change to meet the wait for set point
and the program will wait indefinitely.
If the wait for condition is a digital input, the selected input must meet its configured transition state
after the wait for has been initiated. If the input turns on or off before the wait condition has been
initiated, the program will not continue because the change in state of the input must be seen after
the wait step has been entered.
7. Why does my program not start immediately when “run” is selected?
When a program is started, the EZT-570S scans the program and calculates the overall run time in
order to provide an estimated date of completion. Depending upon the total number of steps in the
program (including the number of jump steps used), it may take the EZT-570S a minute to process all
of the steps in order to calculate this time. Programs can easily reach into the 1000’s of steps when
multiple jumps are used, and it takes time to process through all of the step data.
8. Why has the program not completed its run by the stop date given when I started it?
The estimated stop date provided by the EZT-570S for the program is a calculated value based on
the sum total of all step times. This time can be affected by any guaranteed soaks or wait for
conditions entered into steps of the program. The effects of these times is an unknown and can
cause the program to run longer than calculated because they pause the program until their
conditions are met.
The EZT-570S does update the estimated stop date based on these conditions as they occur;
however, it does make the stop date a moving target.
9. I have guaranteed soak turned on, why is the chamber not following the ramp step?
Guaranteed soak should not be turned on for ramping steps. Guaranteed soak is used to pause a
step until the selected input is within the soak band around set point. On a ramping step, if the step
time is paused due to an input leaving the soak band, the ramp rate is then affected because the set
point is no longer changing. It will hold at that set point until the input returns to the soak band.
Since the purpose of a ramping step is to change the set point over time, the input could be
constantly falling in and out of the soak band throughout the step, thus causing the program to start
and stop. This will elongate the overall step time and alter the rate of change of the set point.
Guaranteed soak should only be enabled on soak steps.
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