Schneider Electric SR2MAN01 user manual Implementing the Solution

Sample Application

Implementing the Solution

Description

Implementing

the Ladder

Diagram

Presented here are the control diagrams to program, as well as the parameters to use for the function blocks.

Below is the control diagram to program:

		-------I1-H1-c1		CC1
		I2			1
		Z1---------
		Z3
		I2-------------		DC1
		Z3
		I1
		I3-------------		TT1
		I4
		A1		TT2
		Z2		RM2
		Z4-------------		SM2
		C1		[Q1
		h1	m2----	[Q2
		T1		[Q3
		T2-------------		[Q4
Prompt	Element
1	Counting vehicles in, subtracting vehicles out and manually updating the number
	of vehicles actually in the car park.
2	Starting the lighting timer.
3	Starting the fan timer.
4	Handling the manual release function.
5	Outputs command: Car park full indicator, blocking the input, lighting the car park
	and running the extraction fan.

When upcounting and downcounting, the counter locks up when the car park becomes full (no spurious detection or counting actions take place if vehicles are allowed to enter by manual release).

Note: For a given counter, the coils CC and DC should only appear once in a ladder diagram.

In addition, output Q2 is activated when entry into the car park is not allowed. This leads to the use of an auxiliary relay to manually lock or unlock the access gate using the navigation keys.

SR2MAN01 11/2007 181