ISPSoft User Manual

Chapter 8 Ladder Diagram
Users can select the All Types option button, the Comparison Instruction option button, the
API option button, or the Function Block option button.
If users select the API option button in the Type Class section, they have to select an
instruction type in the Classification box.
Users can select an applied instruction, a comparison contact, or a function block here.
If users unselect the Auto Close checkbox, they can insert instructions or function blocks
continuously.
• Method 3
Click the position in which an instruction or a function block will be inserted, and type the applied
instruction or the function block definition. As soon as the applied instruction or the function block
definition is typed, a box which can be edited appears. After the typing of the applied instruction or
the function block definition is complete, users can press Enter on the keyboard or click OK at the
right side of the box. (The applied instruction and the function block definition are
case-insensitive.)
If users want to insert a function block, they have to type the function block definition, and they
can not type the operands specifed in the function block. If users want to insert an applied
instruction, they have to type the applied instruction, and they can type the operands specified in
the applied instruction. The users do not have to type all the operands specified in the applied
instruction. The system will assign the operands typed to the corresponding boxes, and ??? will
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