1. 기존 PLANT 내의 제어실에 새로운 CONTROL SYSTEM 을 설치하고 기존 CONTROL SYSTEM 과의 DATA COMMUNICATION을 하려고 한다. 이때 고려해야할 사항을 설명하시오. 또한, OSI (Open System Interconnection) 7 Layer 에 대해 설명하고 TCP/IP 4계층과 비교 및 적용되는 Protocol의 예를 드시오.
① 이기종간의 제어시스템간의 데이타
Process control
Factory automatic & Energy saving
ex)Blower is use inverter. temperature control was improved the quality of product
C1, C2 – capacitor
R1, R2 – resistor
R3, R4 – resistor
D1, D2 – diode
Q1, Q2 – transistor
T1 – transformer
1) Ring Counter의 정의
- Ring Counter : 전자적 펄스 계수장치. 환형계수기라고도 한다. N개의 계수요소(計數要 素)가 환형으로 접속되고, 그중 1개만이 동작상태에 있으며, 계수 펄스 가 1개 가해질 때마다 동작상태가 이웃 요소에 이행되도록 회로를 구성 한 것이
Management-Employee Relationships
One of the most significant things about Southwest Airlines is its philosophy. The main philosophy clearly states that “Ask not what your employees can do for you, but what you can do for your employees”. As seen from this statement, we can clearly see how the Southwest Airlines emphasizes on the Management-Employee relationships. Other than leadership skill
loss prevention manager name Allen in late 2006, and repeatedly discussed them with store managers. Except for a stretch when IT managers temporarily tightened password policies, the problems went unfixed.
"I was basically hitting a glass wall," said Benson, a 23-year-old freshman at the University of Kansas who worked at TJ Maxx beginning in October 2005. "Not one single thing was done. My s