| 摘要 |
PURPOSE:To facilitate the debugging of a program and to improve serviceability by displaying which of group programs constituting a user program is being executed. CONSTITUTION:A user program memory 1 is stored with the user program consisting of plural group programs, a main program which generalizes them, etc. Each group program is started with a group start instruction and ended with a group end instruction. The execution of each group program is started with a group jump instruction and a group restart instruction, and stopped with a group temporary stop instruction and a group end instruction. For the purpose, an input/output memory 4 is provided with an in-start flag SFn and an in-execution flag EFn, and a display part 6 is provided with a display device 6a which turns on when each flag is set to show which group program is ready to execute and which group program is being executed. |
