![EMERGING TECHNOLOGIES
EMERGING TECHNOLOGIES
Juma Masjid Buildng , Thrissur Road, Tana - Irinjalakuda, Thrissur, Kerala, Pin-680121
Tel: 9895241319, 9744516101 email: e4emerging@gmail.com Web: emergingtechnolgies1.blogspot.in
3 A p r 2 0 1 4
PLC-LADDER LOGIC-ATMEGA8
Atmel AVR ATmega8 28-PDIP'
16.000000 MHz crystal
1)Digital input and output
Pin D1 will be high when a digital high is given at pin D0
LADDER DIAGRAM:
|| ||
|| Xd0 Yd1 ||
1 ||-------] [--------------( )-------||
|| ||
|| ||
|| ||
||------[END]-----------------------||
|| ||
|| ||
I/O ASSIGNMENT:
Name | Type | Pin
----------------------------+--------------------+------
Xd0 | digital in | 2
Yd1 | digital out | 3
2) Input negated digital switch
Pin B0 in Microcontroller will be high when a digital low is given at pin
B6
LADDER DIAGRAM:
|| ||
|| Xb0 Yb6 ||
1 ||-------]/[--------------( )-------||
|| ||
|| ||
|| ||](https://image.slidesharecdn.com/ladder-140531054429-phpapp02/85/plc-ladder-examples-1-320.jpg)
![EMERGING TECHNOLOGIES
EMERGING TECHNOLOGIES
Juma Masjid Buildng , Thrissur Road, Tana - Irinjalakuda, Thrissur, Kerala, Pin-680121
Tel: 9895241319, 9744516101 email: e4emerging@gmail.com Web: emergingtechnolgies1.blogspot.in
||------[END]-----------------------||
|| ||
|| ||
I/O ASSIGNMENT:
Name | Type | Pin
----------------------------+--------------------+------
Xb0 | digital in | 27
Yb6 | digital out | 28
3)TON TIMER
The pin RB5 will on after one second delay after program starts
LADDER DIAGRAM:
|| ||
|| Tnew YRB5 ||
1 ||--[TON 1.000 s]---------( )-------||
|| ||
|| ||
|| ||
||------[END]-----------------------||
|| ||
|| ||
I/O ASSIGNMENT:
Name | Type | Pin
----------------------------+--------------------+------
YRB5 | digital out | 19
Tnew | turn-on delay |
4)XOR Gate
LADDER DIAGRAM:
|| ||
|| XD0 XD1 YB5 ||
1 ||-------] [--------------]/[------+-------( )-------||
|| | ||
|| XD0 XD1 | ||
||-------]/[--------------] [------+ ||
|| ||](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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PLC Ladder examples
- 1. EMERGING TECHNOLOGIES EMERGING TECHNOLOGIES Juma Masjid Buildng , Thrissur Road, Tana - Irinjalakuda, Thrissur, Kerala, Pin-680121 Tel: 9895241319, 9744516101 email: e4emerging@gmail.com Web: emergingtechnolgies1.blogspot.in 3 A p r 2 0 1 4 PLC-LADDER LOGIC-ATMEGA8 Atmel AVR ATmega8 28-PDIP' 16.000000 MHz crystal 1)Digital input and output Pin D1 will be high when a digital high is given at pin D0 LADDER DIAGRAM: || || || Xd0 Yd1 || 1 ||-------] [--------------( )-------|| || || || || || || ||------[END]-----------------------|| || || || || I/O ASSIGNMENT: Name | Type | Pin ----------------------------+--------------------+------ Xd0 | digital in | 2 Yd1 | digital out | 3 2) Input negated digital switch Pin B0 in Microcontroller will be high when a digital low is given at pin B6 LADDER DIAGRAM: || || || Xb0 Yb6 || 1 ||-------]/[--------------( )-------|| || || || || || ||
- 2. EMERGING TECHNOLOGIES EMERGING TECHNOLOGIES Juma Masjid Buildng , Thrissur Road, Tana - Irinjalakuda, Thrissur, Kerala, Pin-680121 Tel: 9895241319, 9744516101 email: e4emerging@gmail.com Web: emergingtechnolgies1.blogspot.in ||------[END]-----------------------|| || || || || I/O ASSIGNMENT: Name | Type | Pin ----------------------------+--------------------+------ Xb0 | digital in | 27 Yb6 | digital out | 28 3)TON TIMER The pin RB5 will on after one second delay after program starts LADDER DIAGRAM: || || || Tnew YRB5 || 1 ||--[TON 1.000 s]---------( )-------|| || || || || || || ||------[END]-----------------------|| || || || || I/O ASSIGNMENT: Name | Type | Pin ----------------------------+--------------------+------ YRB5 | digital out | 19 Tnew | turn-on delay | 4)XOR Gate LADDER DIAGRAM: || || || XD0 XD1 YB5 || 1 ||-------] [--------------]/[------+-------( )-------|| || | || || XD0 XD1 | || ||-------]/[--------------] [------+ || || ||
- 3. EMERGING TECHNOLOGIES EMERGING TECHNOLOGIES Juma Masjid Buildng , Thrissur Road, Tana - Irinjalakuda, Thrissur, Kerala, Pin-680121 Tel: 9895241319, 9744516101 email: e4emerging@gmail.com Web: emergingtechnolgies1.blogspot.in || || || || ||------[END]----------------------------------------|| || || || || I/O ASSIGNMENT: Name | Type | Pin ----------------------------+--------------------+------ XD0 | digital in | 2 XD1 | digital in | 3 YB5 | digital out | 19 5)OR Gate LADDER DIAGRAM: || || || XDO YB5 || 1 ||-------] [------+-------( )-------|| || | || || XD1 | || ||-------] [------+ || || || || || || || ||------[END]-----------------------|| || || || || I/O ASSIGNMENT: Name | Type | Pin ----------------------------+--------------------+------ XD1 | digital in | 3 XDO | digital in | 2 YB5 | digital out | 19 6) AND Gate LADDER DIAGRAM: || || || XD0 XD1 YPB5 ||
- 4. EMERGING TECHNOLOGIES EMERGING TECHNOLOGIES Juma Masjid Buildng , Thrissur Road, Tana - Irinjalakuda, Thrissur, Kerala, Pin-680121 Tel: 9895241319, 9744516101 email: e4emerging@gmail.com Web: emergingtechnolgies1.blogspot.in 1 ||-------] [--------------] [--------------( )-------|| || || || || || || ||------[END]----------------------------------------|| || || || || I/O ASSIGNMENT: Name | Type | Pin ----------------------------+--------------------+------ XD0 | digital in | 2 XD1 | digital in | 3 YPB5 | digital out | 19 7)ADC with digital output LADDER DIAGRAM: || || || A5 || 1 ||--------------------{READ ADC}----|| || || || || || || || || || [A5 <] YD3 || 2 ||-----[ 500]-------------( )-------|| || || || || || || || || || [A5 >] YD4 || 3 ||-----[ 499]-------------( )-------|| || || || || || || ||------[END]-----------------------|| || || || || I/O ASSIGNMENT: Name | Type | Pin
- 5. EMERGING TECHNOLOGIES EMERGING TECHNOLOGIES Juma Masjid Buildng , Thrissur Road, Tana - Irinjalakuda, Thrissur, Kerala, Pin-680121 Tel: 9895241319, 9744516101 email: e4emerging@gmail.com Web: emergingtechnolgies1.blogspot.in ----------------------------+--------------------+------ YD3 | digital out | 5 YD4 | digital out | 6 A5 | adc input | 28 8) UART Send the letter “J” over uart LADDER DIAGRAM: || || || {A := } || 1 ||-{ 'J' MOV}--|| || || || || || || || || || A || 2 ||---{UART SEND}---|| || || || || || || ||------[END]------|| || || || || 9) Sending ADC result over UART Here i have converted 10-bit ADC result into 8- bit data(ASCII code) by dividing by 4 for proper UART reading LADDER DIAGRAM: || || || A5 || 1 ||--------------------{READ ADC}----|| || || || || || || || || || {DIV B :=} || 2 ||-----------{ A5 / 4 }-----------|| || || || || || || || || || B ||
- 6. EMERGING TECHNOLOGIES EMERGING TECHNOLOGIES Juma Masjid Buildng , Thrissur Road, Tana - Irinjalakuda, Thrissur, Kerala, Pin-680121 Tel: 9895241319, 9744516101 email: e4emerging@gmail.com Web: emergingtechnolgies1.blogspot.in 3 ||---{UART SEND}--- || || || || || || || || || || {D := } || 4 ||------------------{ 13 MOV}--|| || || || || || || || || || D || 5 ||---{UART SEND}--- || || || || || || || ||------[END]-----------------------|| || || || || I/O ASSIGNMENT: Name | Type | Pin ----------------------------+--------------------+------ A5 | adc input | 28 B | UART tx | 3 D | UART tx | 3