4.12 Operating modes4.12.1 OverviewThe CPU can be in one of 4 operating modes:n Operating mode STOPn Operating mode START-UP(OB 100 - restart / OB 102 - cold start *)n Operating mode RUNn Operating mode HOLDCertain conditions in the operating modes START-UP and RUN require a specific reactionfrom the system program. In this case the application interface is often provided by a callto an organization block that was included specifically for this event.n The application program is not processed.n If there has been a processing before, the values of counters, timers, flags and theprocess image are retained during the transition to the STOP mode.n Command output disable (BASP) is activated this means the all digital outputs aredisabled.n RUN-LED offn STOP-LED onn During the transition from STOP to RUN a call is issued to the start-up organizationblock OB 100.– The processing time for this OB is not monitored.– The START-UP OB may issue calls to other blocks.n All digital outputs are disabled during the START-UP, this means BASP is activated.n RUN LED– The RUN LED blinks as soon as the OB 100 is operated and for at least 3s, evenif the start-up time is shorter or the CPU gets to STOP due to an error.– This indicates the start-up.n STOP LED– During the processing of the OB 100 the STOP LED is on and then turns off.n When the CPU has completed the START-UP OB, it assumes the operating modeRUN.* OB 102 (Cold start)If there is a "Watchdog" error the CPU still remains in STOP state. Withsuch an error the CPU must be manually started again. For this theOB 102 (cold start) must exist. The CPU will not go to RUN without theOB 102. Alternatively you can bring your CPU in RUN state again by anoverall reset respectively by reloading your project.Please consider that the OB 102 (cold start) may exclusively be used fortreatment of a watchdog error.n The application program in OB 1 is processed in a cycle. Under the control of alarmsother program sections can be included in the cycle.n All timers and counters being started by the program are active and the processimage is updated with every cycle.n BASP is deactivated, i.e. all outputs are enabled.n RUN-LED onn STOP-LED offOperating mode STOPOperating mode START-UPOperating mode RUNVIPA System SLIODeployment CPU 013-CCF0R00Operating modes > OverviewHB300 | CPU | 013-CCF0R00 | en | 19-30102
