MMI Product Documentation
A limit statement between an inquiry and a branch just sets a definite time to wait for the inquiry to become true. It has no effect on the outcome of the inquiry or where the program branches to. It only effects the length of the time delay.
If a branch statement is not preceded by an inquiry, or any conditional statement, the branch is automatically assumed TRUE.
An unconditional branch is one in which the steps specified for true and false are the same. An unconditional branch to step 1 (b 01.01) will cause a program to loop back to the beginning of the program every time the above statement is encountered.
The difference between a b 01.01 and a J 0000 is that the jump reloads the program and would therefore pick up any changes edited into the program after it was initially started.
Writing and Editing a Program
Writing
Before a program can ever be written into the UNIPRO, the author must understand and perform the following process:
1.Determine what the program is to do,
2.Write, revise, and rewrite an algorithm (program in words) until part 1 works,
3.Construct the program for the UNIPRO using the OPCODEs listed in "Programmer Alphabet".
The Programmer Editor can be used to create a new program or modify an already existing program. While in Program Edit mode, the unit continues to control the furnace (as long as the Auto LED is on), and a running program continues if the program LED is on.
The Editor Mode:
Unipro 3.5 Process Control | 1 Aug. 1997 |
