Prepared for the MAMOTEP 01 July 2001 Presov

Prepared for the MAMOTEP’ 01 July 2001. Presov (Slovak Republic)

Structured Analysis Methods CSP+T Formal Specification

The waterfall life -cycle model Abstraction Requirement Analysis Architectural Design Detailed Design Time, cost Milestones

Specification Level

Data Flow Diag.

Elements of representation:

condition transition actions menu option

External events definition:

Communication: Process A Synchronization: Process B

Analysis Design Implementation

AC output

Sync Generator ref syncf oheatf texct overheat flow Triac Flow sensor ºC sensor

ref timeval sync Open Loop Control 1. 1 PID Comput ation 1. 2 flow texct oheatf syncf overheat

overheat timeval sync disable Excitation generation 2. 1 texct syncf Overheat watchdog 2. 2 oheatf

11 ms. 3) Applying rule E. 2: DIS = disable STOP x ms. texct

overheat disable Overheat watchdog 2. 2 overheat oheatf, disable oheatf Applying rule D. 1:

The data transformation PID is abstracted in: ref timeval: = pid(valref, valflow) 1) Applying rule D. 1 : PID Comput ation 1. 2 flow 2) Applying rule C. 1 :

timeval overheat sync disable Excitation generation 2. 1 texct syncf Overheat watchdog 2. 2 OLC = OW || EG {init, disable} oheatf

ref sync timeval Open Loop Control 1. 1 PID Comput ation 1. 2 texct oheatf SYSTEM = ( syncf overheat flow