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| Main Controller: 25x500 Segment Programmable
Chapter 7
|
7-50
305435H03
Step
The setpoint changes instantaneously from its current value to a new value at the
beginning of a segment. A Step segment has a minimum duration of 1 second.
Time
A time segment defines the duration of the segment. In this case the target setpoint is
defined and the time taken to reach this value. A dwell period is set by making the target
setpoint the same value as the previous setpoint.
GoBack
Go Back allows segments in a program to be repeated a set number of times. The
diagram shows an example of a program which is required to repeat the same section a
number of times and then continue the program.
When planning a program it is advisable to ensure that the end and start setpoint of the
program are the same otherwise it will step to the different levels.
'Goback Seg' specifies the segment to go back to 'Goback Cycles' specifies the number
of times the Goback loop is executed Overlapping Goback loops are disallowed
NOTE If a second or more 'Go Back' segments are created, they cannot return to a
segment before the previous 'Go Back' segment as shown.
In this diagram a Go Back segment can be created from 3 to 2 or 1. Go Back segments
can also be created from 7 to 6 or 5 or 4 but not from 7 to 2 or 1.
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