module 1 Flashcards
Introduction and Overview of Distributed Control Systems(DCS) (37 cards)
Name the 5 IEC-61131-3 programming languages
- ST
- LL
- SFC
- FBD
- IL
First 2 DCS
1975 Honeywell TDC 2000
1975 Yokogawa Centum
First PLC and the language the protocol
1975 Modicon PLC => MODBUS
DCS advantages
– Analog process superiority
– Better device organization for >500 device networks
PLC Advantages
– Discrete control superiority,
– 10ms task rate
– Isolated skid automation
DCS Disadvantages
slower task rate than PLC 100ms task rate
Advantage of Foundation Field bus
devices capable of controlling process control algorithms
DB9 Connector pins
- DCD Data Carrier Detect
- Rx Receive
- Tx Transmit
- DTR Data Terminal Ready
- GND Ground
- DSR Data set ready
- RTS Ready to send
- CTS Clear to send
- RI Ring Indicator
DB9 Pin 1
- DCD Data Carrier Detect
DB9 Pin 2
- Rx Receive
DB9 Pin 3
- Tx Transmit
DB9 Pin 4
- DTR Data Terminal Ready
DB9 Pin 5
- GND Ground
DB9 Pin 6
- DSR Data set ready
DB9 Pin7
- RTS Ready to send
DB9 Pin 8
- CTS Clear to send
DB9 Pin 9
- RI Ring Indicator
~I/O for SCADA
< 100
~I/O for PLC
< 500
~I/O for DCS
> 500
clock speed for PM862 DCS cabinets in classroom
48 Mhz
memory for PM862 DCS cabinets in classroom
8 MB
what does POST stand for
Power on System Test
Emerson
Delta v