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In order to change from one state to another, MIDAS provides four basic transition functions : [[File:Transition.gif|center|frame|Representation of run states and associated transitions]]

Transition START INT 1 4 21h 0 R 500 Transition STOP INT 1 4 21h 0 R 500

Transition in progress INT 1 4 2h 0 RWD 0 Requested transition INT 1 4 2h 0 RWD 0

:: [[Run States and Transitions # MIDAS State and Transition Codes |code ]] :: [[Run States and Transitions # MIDAS State and Transition Codes |code ]]

start transition. Also the timing of the program startup and run transition is wrong - in my tests, the program starts too

Transition request BOOL 1 4 5h 0 RWD n [1] TRANSITION START

...eives a '''Start Transition''' , and continues until it receives a '''Stop transition'''. In the simplest case, this is when the commands "Start" and "Stop" are

...a command or script to be executed on a [[Run States and Transitions|START transition]]. ...a command or script to be executed on a [[Run States and Transitions|STOP transition]].

Transition in progress = INT : 0 Requested transition = INT : 0

std::cout << "The current transition timeout is " << exp["Transition timeout"] << std::endl; // re-assignment like `exp["Transition timeout"] = 12345;`.

...receives a Start ''transition'' , and continues until it receives a Stop ''transition''. ;Transition

TRANSITION START TRANSITION STOP

Transition debug flag INT 1 4 23h 0 RWD 0 Transition connect timeout INT 1 4 23h 0 RWD 10000

void BeginRun(int transition,int run,int time){} void BeginRun(int transition,int run,int time){

transition sequence

...unctions are associated with a particular [[Run States and Transitions|Run Transition]] as shown below: ...n: top; background-color: rgb(255, 255, 204); font-weight: bold;" | System Transition Function

...ivated for a particular experiment's [[Run States and Transitions |run or transition state]] or a combination of any of them. A frontend can also cause a transition to be '''delayed ''' until a particular condition is met (see [[Run Stat

...s of trigger can be enabled/activated for a particular experimental State, Transition State, or a combination of any of them. Examples such as "read scaler event ...ion periods, any MIDAS client registered to receive notification of such a transition will be able to perform dedicated tasks in either synchronized or asynchron

...gin-of-run transition. Each client responds with whether it's okay for the transition to proceed.

...pecifies when the read-out of an event occurs or is enabled (i.e. on which transition state(s) and/or on which run state(s) respectively) by using a combination ...en prior to forcing an End-of-Run [[Run States and Transitions#transition|Transition]]. The value 0 disables this option.