Delta Electronics Programmable Logic Controller DVP-PLC User Manual

Page 338

7 Application Instructions API 50-99

D V P - P L C A P P L I C AT I O N M A N U A L

7-54

API Mnemonic Operands

Function

ALT P

Alternate State

Controllers

ES/EX/SS SA/SX/SC EH/SV

Bit Devices

Word Devices

Program Steps

Type

X Y M S K H

KnX

KnY KnM KnS T

ALT, ALTP: 3 steps

PULSE 16-bit 32-bit

ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV

Operands:

: Destination device

Explanations:

1. See the specifications of each model for their range of use.

2. When ALT instruction is executed, “On” and “Off” of D will switch.

3. This instruction adopts pulse execution instructions (ATLP).

Program Example 1:

When X0 goes from Off to On, Y0 will be On. When X0 goes from Off to On for the second time, Y0 will be Off.

ALTP

Program Example 2:

Using a single switch to enable and disable control. At the beginning, M0 = Off, so Y0 = On and Y1 = Off. When X10

switches between On/Off for the first time, M0 will be On, so Y1 = On and Y0 = Off. For the second time of On/Off

switching, M0 will be Off, so Y0 = On and Y1 = Off.

X10

ALT

Program Example 3:

Generating flashing. When X10 = On, T0 will generate a pulse every 2 seconds and Y0 output will switch between On

and Off following the T0 pulses.

X10

TMR

ALTP

K20