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DVP-ES2 操作手册 –程序篇

1 PLC

梯形图的基本原理

1.1 PLC 扫描方法..............................................................................................................1-2

1.2 信号流向.......................................................................................................................1-3

1.3 常开, 常闭节点.............................................................................................................1-3

1.4 PLC 继电器和寄存器....................................................................................................1-4

1.5 梯形图符号 ...................................................................................................................1-5

1.5.1 创建一个 PLC 梯形图程序 .........................................................................1-6

1.5.2 LD / LDI (常开或者常闭节点的载入) ...........................................................1-7

1.5.3 LDP / LDF (上升沿或者下降沿指令的载入) ................................................1-7

1.5.4 AND / ANI (常开节点或常闭节点的串接) ....................................................1-7

1.5.5 ANDP / ANDF (上升沿或下降沿节点的串接) ..............................................1-7

1.5.6 OR / ORI (常开节点或常闭节点的并接)......................................................1-8

1.5.7 ORP / ORF (上升沿或下降沿节点的并接) ..................................................1-8

1.5.8 ANB (区块串接) ..........................................................................................1-8

1.5.9 ORB (区块串接) ..........................................................................................1-8

1.5.10 MPS / MRD / MPP (Branch instructions 分支指令) ....................................1-9

1.5.11 STL (步进梯形程序)..................................................................................1-10

1.5.12 RET (返回)................................................................................................1-10

1.6 梯形图和指令的转换...................................................................................................1-11

1.7 梯形图的化简 .............................................................................................................1-15

1.8 常用基本程序设计范例...............................................................................................1-18

程序概念

2.1 ES2 记忆区...................................................................................................................2-2

2.2 ES2 停电保持记忆方式 ................................................................................................2-5

2.3 PLC 的位，半字节，字节，字 .....................................................................................2-6

2.4 二进制, 八进位, 十进制, BCD, 十六进制 ....................................................................2-6

2.5 M 继电器 ......................................................................................................................2-9

2.6 步进继电器 S..............................................................................................................2-20

2.7 定时器 T .....................................................................................................................2-20

2.8 计数器 C.....................................................................................................................2-21

2.9 高速计数器 .................................................................................................................2-23

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2.10 特殊数据寄存器 ......................................................................................................... 2-28

2.11 E，F 变址寄存器 ...................................................................................................... 2-37

2.12 指针[N]，指针[P]，中断指针[I] .................................................................................. 2-38

2.13 特殊 M 继电器及 D 寄存器群组应用说明 ................................................................... 2-41

指令集

3.1 基本指令 (没有 API 编号) 一览表............................................................................... 3-2

3.2 基本指令 (没有 API 编号) 说明................................................................................... 3-3

3.3 指针 ............................................................................................................................. 3-9

3.4 中断指针 .................................................................................................................... 3-10

3.5 API 应用指令组成说明................................................................................................3-11

3.6 API 指令一览表.......................................................................................................... 3-20

3.7 API 指令详细说明 ...................................................................................................... 3-28

通讯

4.1 通讯口.......................................................................................................................... 4-2

4.2 ASCII 模式通讯协议.................................................................................................... 4-3

4.2.1 ADR (通讯地址).......................................................................................... 4-3

4.2.2 命令码及数据 ............................................................................................. 4-4

4.2.3 LRC 校验 (校验和)..................................................................................... 4-5

4.3 RTU 模式通讯协议...................................................................................................... 4-7

4.3.1 地址 (通讯地址) ......................................................................................... 4-7

4.3.2 命令码及数据 ............................................................................................. 4-7

4.3.3 CRC 校验 (校验和).................................................................................... 4-9

4.4 PLC 装置地址 .............................................................................................................4-11

4.5 功能码........................................................................................................................ 4-13

4.5.1 功能码: 01, 读接点状态 (不可读输入接点状态)....................................... 4-13

4.5.2 功能码: 02, 读接点状态 (可读输入接点状态) .......................................... 4-14

4.5.3 功能码: 03, 读出寄存器内容值 ................................................................ 4-15

4.5.4 功能码: 05, 强制单独节点状态 ................................................................ 4-16

4.5.5 功能码: 06, 预设单独寄存器的值............................................................. 4-17

4.5.6 功能码: 15, 强制多个接点........................................................................ 4-17

4.5.7 功能码: 16, 预设多个寄存器的值............................................................. 4-19

顺序功能图

SFC

5.1 步进梯形指令 [STL], [RET] ......................................................................................... 5-2

5.2 顺序功能图 (SFC)....................................................................................................... 5-3

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1-1

PLC梯形图基本原理

说明梯形图的基本原理。梯形图是被广泛采用的 PLC 编程语言，对于熟悉

PLC 原理的用户可跳到下一章了解更多的编程原理；对于不熟悉 PLC 工作

原理的用户请参考这一章以使用户对 PLC 原理获得全面的理解。

1.1

PLC 扫描方法 .......................................................................................................................1-2

1.2 信号流向 ...............................................................................................................................1-3

1.3 常开，常闭节点 ....................................................................................................................1-3

1.4 PLC 继电器和寄存器 ............................................................................................................1-4

1.5 梯形图符号............................................................................................................................1-5

1.5.1

创建一个 PLC 梯形图程序 .......................................................................................1-6

1.5.2 LD / LDI (常开或者常闭节点的载入) ........................................................................1-7

1.5.3 LDP / LDF (上升沿或者下降沿指令的载入) .............................................................1-7

1.5.4 AND / ANI (常开节点或常闭节点的串接) .................................................................1-7

1.5.5 ANDP / ANDF (上升沿或下降沿节点的串接) ...........................................................1-7

1.5.6 OR / ORI (常开节点或常闭节点的并接)...................................................................1-8

1.5.7 ORP / ORF (上升沿或下降沿节点的并接) ...............................................................1-8

1.5.8 ANB (区块串接) .......................................................................................................1-8

1.5.9 ORB (区块串接) .......................................................................................................1-8

1.5.10 MPS / MRD / MPP (Branch instructions 分支指令) .................................................1-9

1.5.11 STL (步进梯形程序) ...............................................................................................1-10

1.5.12 RET (返回) .............................................................................................................1-10

1.6 梯形图和指令的转换 ...........................................................................................................1-11

1.7 梯形图的化简......................................................................................................................1-15

1.8 常用基本程序设计范例........................................................................................................1-18

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