Delta DVP-ES2 User Manual download pdf (Page 327)

100

101

3. Instruction Set

3-211

Sending data: (PLC→External equipment)

D100L D101L D102L D103L

Source data register, starting from

lower 8 bits of D100

Length = 4

Receving data: (External equipment→PLC)

D120L D122L D123L D124L D125L D126LD121L

Registers for r starting from

lower 8 bits of D120

eceived data,

Length = 7

Points to note:

1. PLC COM1 RS-232: Associated flags (Auxiliary relays) and special registers (Special D) for

communication instructions RS / MODRD

Flag Function Action

M1138

COM1 retain communication settings. Communication settings will be

reset (changed) according to the content in D1036 after every scan

cycle. Users can set ON M1138 if the communication protocol

requires to be retained. When M1138 = ON, communication settings

will not be reset (changed) when communication instructions are

being processed, even if the content in D1036 is changed.

Supported communication instructions:

RS / MODRW

User

sets and

resets

M1139

COM1 ASCII / RTU mode selection, ON: RTU mode, OFF: ASCII

mode.

Supported communication instructions:

RS / MODRW

User

sets and

resets

M1312

COM1 sending request. Before executing communication instructions,

users need to set M1312 to ON by trigger pulse, so that the data

sending and receiving will be started. When the communication is

completed, PLC will reset M1312 automatically.

Supported communication instructions:

RS / MODRW

User

sets and

system

resets

M1313

COM1 data receiving ready. When M1313 is ON, PLC is ready for

data receiving

Supported communication instructions

: RS / MODRW

System

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Delta DVP-ES2 User Manual Page 327

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