c3controls 900-SBA8I4OM Instruction Manual - Page 14

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14
SERIES 900 SMART PROGRAMMABLE RELAYS
SAMPLE PROGRAMS
CAR PARKING
There are five (5) parking spots available in a parking area. There are two (2) sensors, one at the entry gate and one at the exit gate. When all the parking spots are occupied,
there is a lamp outside the entry gate indicating parking is full. When a parking spot becomes available, the lamp is switched ON indicating parking is available.
PROGRAMMING
Input I1 is the sensor at the Entry gate and Input I2 is the sensor at the exit gate.
Output Q1 indicates that Parking is available; Output Q2 indicates that Parking is Full.
Counter C1 is used to count the number of vehicles that have entered or exited the parking.
Compare Counters P1 & P2 are used to switch ON outputs Q1 & Q2 respectively by comparing the count of counter C1.
INPUT SELECTION
1. Click on the Input symbol in the I/O selector window and select "I1. "
2. Move the cursor to the Contact 1 column of the first row and left click on the block to place the input.
3. Click on the Input symbol in the I/O selector window and select "I2. "
4. Move the cursor to the Contact 1 column of the second row and left click on the block to place the input. Also place it in the Contact 1 column of the third row.
COUNTER SELECTION & PARAMETER EDITING
5. Select Counter C1 from the I/O selector window and place it in the coil column of line 1. Right click on the counter and select the option counting input.
6. Select the same counter C1 and place it in the coil column of line 3. Right click on the counter and select the option direction input.
COMPARE COUNTER SELECTION & PARAMETER EDITING
7. Select Compare Counter P1 from the I/O selector window and place it in the contact column of line 4.
8. Right click on the compare counter and select properties.
9. Under the compare selection option, select 'F1' as 'C1' , 'OP' as '<' , 'F2' as 'Abs Value' and reference count as 5.
10. Select Compare Counter P2 from the I/O selector window and place it in the contact column of line 5.
11. Right click on the compare counter and select properties.
12. Under the compare selection option, select 'F1' as 'C1' , 'OP' as '=' , 'F2' as 'Abs Value' and reference count as 5.
OUTPUT CONFIGURATION
13. Select Output Q1 from the I/O selector window and place it in the coil column.
14. Right click on output Q1 and select the option 'State Change: Contactor. '
LADDER PROGRAM
WE DIDN'T INVENT CONTROL, WE'RE PERFECTING IT.