Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual Phase 2 inputs high-speed counter Example

2. Programming Concepts

1.X21 drives M1235 to determine counting direction (Up/Down) of C235.

2.When X20 = ON, RST instsruction executes and the current value in C235 will be cleared. Contact C235 will be OFF

3.When X22 = ON, C235 receives signals from X0 and counter will count up (+1) or count down (-1).

4.When counter C235 reaches K5, contact C235 will be ON. If there is still input signal input for X0, it will keep on counting.

X21,M1243 contact					counting up			counting down
X20
X22
X0
C243							7
present						6			6
value										5
						5					4
3				4
				3
			1	2
	0
Y0, C243		contact

1-phase 2 inputs high-speed counter:

Example:
LD	X20
RST	C247
LD	X21
DCNT	C247 K5
LD	C247
OUT	Y0

X20

RST C247 X21

DCNT C247 K5 C247

Y0

1.When X20 is ON, RST instsruction executes and the current value in C247 will be cleared. Contact C247 will be OFF.

2.When X21=ON, C247 receives count signals from X0 and counter counts up (+1), or C247 receives count signal from X1 and counter counts down (-1)

3.When C247 reaches K5, contact C247 will be ON. If there is still input signal from X0 or X1, C247 will keep on counting

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