Yaskawa MP940 Reference Manual - Manual (Page 43)

MotionSuite™ MP940 Machine Controller Reference Manual Operation Mode
3-1
Chapter 3: Basic System Operation
An explanation of the basic system operation of the MP940 is given in this chapter.
Operation Mode
This section describes both of the MP940 operation modes: the run mode and the stop
mode.
Figure 3.1: MP940 Operation Mode Classifications
Run Mode
When power is fed into the MP940, the READY (RDY) and RUN (RUN)
LEDs light up (the ALARM (ALM) LED is off), and the unit is in the run
mode. This means that there are no errors or failures in the MP940, and that
user programs and I/O operations can be executed. The run mode also
continues when an I/O conversion error, user operation error, or when a user
program is stopped; however, the ALARM (ALM) LED lights. See Chapter
10 "Troubleshooting" for error contents and countermeasures.
Stop Mode
During the stop mode, user program execution is halted, and all outputs are
reset (the digital output = 0).This state is displayed by the RUN LED being
OFF. Drawing programs (DWG.H or DWG.L) are not executed in this state.
Operation Mode Run Mode
• RDY, RUN LEDs ON
• User program, I/O operation functions
Stop Mode
• RUN LED OFF
• User programs stopped