ISPSoft User Manual Example 3: The En pin of the first applied instruction is connected to the input node representing M0, and therefore the mark P can be inserted into in the input node representing M0. However, the mark P/F can not be inserted into the En pin of the second applied instruction. Example 4: The figure below is an incorrect example. The mark F can not be inserted into an input node which does not represent a Boolean device or a symbol whose data type is BOOL. Inserting the mark P/F (1) Select a position into which the mark P/F will be inserted in the working area. Users are allowed to insert the mark P/F into the positions marked with red frames in the figure below.
Although the operand assigned to the input pin of the function block FB0 is a Boolean operand, the mark P/F can not be inserted into the input pin of FB0. Besides, P/F can not be inserted into a position which does not have an output node, and a position which is not connected to an object. For example, the mark P/F can not be inserted into the input node in network 3. 11-18 P/ F P/ F