Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual OUT Y0, Plus 1 or count down minus

2. Programming Concepts

M relays M1200~M1254 are used to set the up/down counting direction for C200~C254 respectively. Setting the corresponding M relay ON will set the counter to count down.

Example:

LD X10

OUT M1200

LD X11

RST C200

LD X12

CNT C200 K-5

LD C200

OUT Y0

a) X10 drives M1200 to

determine counting direction

(up / down) of C200

b) When X11 goes from OFF to

ON, RST instsruction will be

executed and the PV (present

value) in C200 will be cleared

and contact C200 is OFF.

c) When X12 goes from Off to

On, PV of C200 will count up

(plus 1) or count down (minus

X10

M1200

X11

RST C200

X12

DCNT C200 K-5

C200

Y0

	Accumulatively		Accumulatively
X10	increasing	Progressively	increasing

decreasing

X11

X12

1).

d) When PV in C200 changes

from K-6 to K-5, the contact

C200 will be energized. When

PV in C200 changes from K-5

to K-6, the contact of C200

will be reset.

e) If MOV instruction is applied

through WPLSoft or HPP to

designate a value bigger than

SV to the PV register of C0,

next time when X1 goes from

OFF to ON, the contact C0

will be ON and PV of C0 will

equal SV.

PV in

C200 0

Contacts

Y0, C0

2

1

5

4 4

3	3	2	1	0		1									0
					-		-2	-3	-4	-5
														-3
														-4
											-6			-5
When the output contact														-6
was On.												-7	-8	-7

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