ISPSoft User Manual applied instructions and function blocks can not be used in a transition program, but comparison contacts and block logic instructions (NP, PN, and INV) can be used in a transition program. If the programming language used to create a transition program is a ladder diagram, the program code of the transition program must be composed of one network, and the output contact must be assigned a symbol name which is the same as the transition program name. Besides, multiple outputs are not allowed in a transition program created by means of a ladder diagram.
If the programming language used to create a transition program is a structured text, there is no limit on the number of lines of program code. However, a Boolean state in a transition program must be assigned to a symbol name which is the same as the transition program name. If the programming language used to create a transition program is a function block diagram, the program code of the transition program must be composed of one network, and the output contact must be assigned a symbol name which is the same as the transition program name. Besides, multiple outputs are not allowed in a transition program created by means of a function block diagram.
If the programming language used to create a transition program is an instruction list, there is no limit on the number of lines of program code. OUT, SET, RST, and applied instructions can not be used in a transition program created by means of an instruction list. Besides, the output instruction in a transition program created by means of an instruction list must be TRANS, and the operand for TRANS must be assigned a symbol name which is the same as the transition program name. 14-8