Delta VP3000 Series - 7-1-1 Introduction to Device Functions

Chapter 7 Second Development PlatformVP3000
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Type Device Item Range of use Function
Serial port (for writing / reading programs) RS-485 / keypad port
Analog input / output Built-in three analog inputs and two analog outputs
Function expansion module
Optional
accessory
EMV-D42A; EMV-R6AA; EMV-A22A
7-1-1 Introduction to Device Functions
Input / output contacts
Function of input contact X: the input contact X connects with an input device, and reads input
signals entering the PLC. There is no limit to the number of times that contact A or B of each input
contact X can be used in the program. The ON / OFF of input contact X only can change with the ON /
OFF of input device; a peripheral device (WPLsoft) cannot be used to force input contact X to be ON /
OFF.
Output contact Y
The task of output contact Y is to send an ON / OFF signal to drive the load connected with output
contact Y. Output contacts are divided into two types: relay and transistor. There is no limit to the number
of times that contact A or B of each output contact Y. It is recommended that the number of output coil
Y is used only once in a program, otherwise the right to determine the output state when the PLC
performs program scanning will be assigned to the program's final output Y circuit.
Numerical value, constant [K] / [H]
Constant
Single-byte
K Decimal
K-32,768–K32,767
Double-byte K-2,147,483,648–K2,147,483,647
Single-byte
H Hexadecimal
H0000–HFFFF
Double-byte H00000000–HFFFFFFFF
PLC can use five types of numerical values to implement calculations based on its control tasks;
the following content is explanations of the tasks and functions of different numerical values.
 Binary Number (BIN)
PLC's numerical operations and memory use binary numbers. Binary values and related terms
are as follows:
bit Bit is the fundamental unit of binary system, and its state is either 1 or 0
Nibble
Consist of four consecutive bits, e.g. b3–b0. To indicate a value which range
between 0–9 in decimal or a value which range between 0–F in
hexadecimal .