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i
DVP-ES2 操作手册 –程序篇
目录
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
2
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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ii
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
3
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
4
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
5
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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iii
5.3 步进梯形指令动作说明.................................................................................................5-5
5.4 步进梯形设计程序须知...............................................................................................5-11
5.5 流程种类.....................................................................................................................5-13
5.6 IST 指令 .....................................................................................................................5-24
6
故障诊断
6.1 常见错误及处理方法.....................................................................................................6-2
6.2 D1004 缓存器错误码表 (错误码为 16 进制编码) .........................................................6-4
6.3 演算错误旗标 ...............................................................................................................6-7
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iv
www.plcworld.cn

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。
目录
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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