Delta DVP-SA2 User Manual

4-1
Communications
This chapter introduces information regarding the communications ports of the PLC.
Through this chapter, the user can obtain a full understanding about PLC
communication ports.
Table of Contents
4.1 Communication Ports ........................................................................................................ 4-2
4.2 Communication Protocol ASCII mode .............................................................................. 4-3
4.2.1 ADR (Communication Address) ............................................................................ 4-3
4.2.2 CMD (Command code) and DATA ........................................................................ 4-4
4.2.3 LRC CHK (checksum) ........................................................................................... 4-5
4.3 Communication Protocol RTU mode ................................................................................ 4-7
4.3.1 Address (Communication Address) ....................................................................... 4-7
4.3.2 CMD (Command code) and DATA ........................................................................ 4-7
4.3.3 CRC CHK (check sum) ......................................................................................... 4-8
4.4 PLC Device Address ......................................................................................................... 4-11
4.5 Command Code ................................................................................................................ 4-13
4.5.1 Command Code: 01, Read Status of Contact (Input point X is not included) ..... 4-13
4.5.2 Command Code: 02, Read Status of Contact (Input point X is included) ........... 4-14
4.5.3 Command Code: 03, Read Content of Register (T, C, D) ................................... 4-15
4.5.4 Command Code: 05, Force ON/OFF single contact ........................................... 4-16
4.5.5 Command Code: 06, Set content of single register ............................................ 4-17
4.5.6 Command Code: 15, Force ON/OFF multiple contacts ...................................... 4-18
4.5.7 Command Code: 16, Set content of multiple registers ....................................... 4-19

Delta DVP-SA2 Specifications

General

Brand	Delta
Model	DVP-SA2
Category	Controller
Language	English