Delta Electronics VFD-E manual Features and Functions of Counter

Appendix D How to Use PLC Function

D.4.6 The Features and Functions of Counter

Features:

Item	16 bits counters		32 bits counters
Type	General	General	High speed
Count direction	Count up	Count up/down
Settings	0~32,767	-2,147,483,648~+2,147,483,647
Designate for	Constant K or data register D	Constant K or data register D (2 for designated)
constant
Present value	Counter will stop when	Counter will keep on counting when attaining
change	attaining settings	settings
	When count attains settings,	When count up attains settings, contact will be On
		and latched.
Output contact	contact will be On and
		When count down attains settings, contact will
	latched.
		reset to Off.
Reset action	The present value will reset to 0 when RST command is executed and contact
	will reset to Off.
Present register	16 bits	32 bits
		After scanning,	Act immediately when count
Contact action	After scanning, act together.		attains. It has no relation with
		act together.
			scan period.

Functions:

When pulse input signal of counter is from Off to On, the present value of counter equals to settings and output coil is On. Settings are decimal system and data register D can also be used as settings.

16-bit counters C0~C7:

1.Setting range of 16-bit counter is K0~K32,767. (K0 is the same as K1. output contact will be On immediately at the first count.

2.General counter will be clear when PLC is power loss. If counter is latched, it will remember the value before power loss and keep on counting when power on after power loss.

3.If using MOV command, WPLSoft to send a value, which is large than setting to C0, register, at the next time that X1 is from Off to On, C0 counter contact will be On and present value will be set to the same as settings.

4.The setting of counter can use constant K or register D (not includes special data register D1000~D1044) to be indirect setting.

5.If using constant K to be setting, it can only be positive number but if setting is data register D, it can be positive/negative number. The next number that counter counts up from 32,767 is -32,768.

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 D-23