实例介绍
【实例简介】
【实例截图】
【核心代码】
目录 1 位逻辑指令...................................................................................................................................................11 1.1 位逻辑指令概述............................................................................................................................11 1.2 >=1：或逻辑操作 .........................................................................................................................12 1.3 &：与逻辑操作 .............................................................................................................................13 1.4 先与后或逻辑操作和先或后与逻辑操作........................................................................................14 1.5 XOR：异或逻辑操作....................................................................................................................16 1.6 插入数字输入................................................................................................................................17 1.7 取反逻辑输入................................................................................................................................18 1.8 =：赋值 ........................................................................................................................................19 1.9 #：中间输出 .................................................................................................................................21 1.10 R：复位输出.................................................................................................................................23 1.11 S：置位输出.................................................................................................................................24 1.12 RS：复位置位触发器 ...................................................................................................................25 1.13 SR：置位复位触发器 ...................................................................................................................27 1.14 N：RLO 负跳沿检测.....................................................................................................................28 1.15 P：RLO 正跳沿检测.....................................................................................................................29 1.16 SAVE：将 RLO 存入 BR 存储区 ..................................................................................................30 1.17 NEG：地址下降沿检测 ................................................................................................................31 1.18 POS：地址上升沿检测.................................................................................................................32 2 比较指令 ......................................................................................................................................................33 2.1 比较指令概述................................................................................................................................33 2.2 CMP ? I：比较整数......................................................................................................................34 2.3 CMP ? D：比较长整数.................................................................................................................35 2.4 CMP ? R：比较实数 ....................................................................................................................36 3 转换指令 ......................................................................................................................................................37 3.1 转换指令概述................................................................................................................................37 3.2 BCD_I：BCD 转换为整型数.........................................................................................................38 3.3 I_BCD：整型数转换为 BCD.........................................................................................................39 3.4 BCD_DI：BCD 转换为长整型数 ..................................................................................................40 3.5 I_DI：整型转换为长整型..............................................................................................................41 3.6 DI_BCD：长整型数转换为 BCD ..................................................................................................42 3.7 DI_R：长整型数转换为实数.........................................................................................................43 3.8 INV_I：对整数求反码...................................................................................................................44 3.9 INV_DI：对长整型数求反码.........................................................................................................45 3.10 NEG_I：对整数求补码.................................................................................................................46 3.11 NEG_DI：对长整数求补码...........................................................................................................47 3.12 NEG_R：实数取反.......................................................................................................................48 3.13 ROUND：取整为长整型...............................................................................................................49 3.14 TRUNC：截取长整数部分............................................................................................................50 3.15 CEIL：向上取整...........................................................................................................................51 3.16 FLOOR：向下取整.......................................................................................................................52 Fehler! Formatvorlage nicht definiert. 用于 S7-300 和 S7-400 编程的功能块图 (FBD) 8 参考手册, 10/2010, A5E03290619-01 4 计数器指令...................................................................................................................................................53 4.1 计数器指令概述............................................................................................................................53 计数器的位组态 ...........................................................................................................................................54 4.2 S_CUD：分配参数和递增/递减计数.............................................................................................55 4.3 S_CU：分配参数和递增计数........................................................................................................57 4.4 S_CD：分配参数和递减计数........................................................................................................59 4.5 SC：设置计数器值.......................................................................................................................61 4.6 CU：加法计数器 ..........................................................................................................................63 4.7 CD：减法计数器 ..........................................................................................................................64 5 数据块指令...................................................................................................................................................65 5.1 OPN：打开数据块........................................................................................................................65 实例 66 6 跳转指令 ......................................................................................................................................................67 6.1 跳转指令概述................................................................................................................................67 6.2 JMP：块中无条件跳转 .................................................................................................................68 6.3 JMP：块中有条件跳转 .................................................................................................................69 6.4 JMPN：若非则跳转......................................................................................................................70 6.5 LABEL：跳转标签........................................................................................................................71 7 整型数学运算指令........................................................................................................................................73 7.1 整数数学运算指令概述 .................................................................................................................73 7.2 判断整数数学运算指令结果状态字的位........................................................................................74 7.3 ADD_I：整数加法.........................................................................................................................75 7.4 SUB_I：整数减法.........................................................................................................................76 7.5 MUL_I：整数乘法.........................................................................................................................77 7.6 DIV_I：整数除法 ..........................................................................................................................78 7.7 ADD_DI：长整数加法 ..................................................................................................................79 7.8 SUB_DI：长整数减法...................................................................................................................80 7.9 MUL_DI：长整数乘法 ..................................................................................................................81 7.10 DIV_DI：长整型数除法 ................................................................................................................82 7.11 MOD_DI：返回双精度整数余数...................................................................................................83 8 浮点型数学运算指令 ....................................................................................................................................85 8.1 浮点型数学运算总览.....................................................................................................................85 8.2 评估浮点数指令状态字的位..........................................................................................................86 8.3 基本指令.......................................................................................................................................87 8.3.1 ADD_R：实数加法.......................................................................................................................87 8.3.2 SUB_R：实数减法 .......................................................................................................................88 8.3.3 MUL_R：实数乘法.......................................................................................................................89 8.3.4 DIV_R：实数除法.........................................................................................................................90 8.3.5 ABS：生成浮点数的绝对值..........................................................................................................91 8.4 扩展指令.......................................................................................................................................92 8.4.1 SQR：生成浮点数的平方.............................................................................................................92 8.4.2 SQRT：生成浮点数的平方根.......................................................................................................93 8.4.3 EXP：生成浮点数的指数值..........................................................................................................94 8.4.4 LN：生成浮点数的自然对数.........................................................................................................95 8.4.5 生成浮点值角度的三角函数..........................................................................................................96 9 传送指令 ......................................................................................................................................................99 9.1 MOVE：分配值 ............................................................................................................................99 Fehler! Formatvorlage nicht definiert. 用于 S7-300 和 S7-400 编程的功能块图 (FBD) 参考手册, 10/2010, A5E03290619-01 9 10 程序控制指令.............................................................................................................................................101 10.1 程序控制指令概述 ......................................................................................................................101 10.2 CALL：调用无参数的 FC/SFC...................................................................................................102 10.3 CALL_FB：以框方式调用 FB.....................................................................................................104 10.4 CALL_FC (以框方式调用 FC) ....................................................................................................106 10.5 CALL_SFB：以框方式调用系统 FB...........................................................................................108 10.6 CALL_SFC (以框方式调用系统 FC)...........................................................................................110 10.7 调用多重实例..............................................................................................................................112 10.8 从库中调用块..............................................................................................................................112 10.9 主控继电器指令..........................................................................................................................113 10.10 使用 MCR 函数的重要注意事项 .................................................................................................114 10.11 MCR</MCR>：主控继电器开/关................................................................................................115 10.12 MCRA/MCRD：主控继电器激活/去活 .......................................................................................118 10.13 RET：返回 .................................................................................................................................121 11 移位和循环指令 .........................................................................................................................................123 11.1 移位指令.....................................................................................................................................123 11.1.1 移位指令概述..............................................................................................................................123 11.1.2 SHR_I：整数右移 ......................................................................................................................124 11.1.3 SHR_DI：长整数右移 ................................................................................................................126 11.1.4 SHL_W：字左移 ........................................................................................................................127 11.1.5 SHR_W：字右移........................................................................................................................129 11.1.6 SHL_DW：双字左移..................................................................................................................130 11.1.7 SHR_DW：双字右移 .................................................................................................................131 11.2 循环指令.....................................................................................................................................133 11.2.1 循环移位指令概述 ......................................................................................................................133 11.2.2 ROL_DW：双字循环左移 ..........................................................................................................133 11.2.3 ROR_DW：双字循环右移..........................................................................................................135 12 状态位指令.................................................................................................................................................137 12.1 状态位指令概述..........................................................................................................................137 12.2 OV：溢出异常位 ........................................................................................................................138 12.3 OS：存储溢出异常位.................................................................................................................140 12.4 UO：无序异常位........................................................................................................................142 12.5 BR：BR 存取区异常位...............................................................................................................143 12.6 <> 0：结果位..............................................................................................................................144 13 定时器指令.................................................................................................................................................147 13.1 定时器指令总览..........................................................................................................................147 13.2 定时器的存储区和组件...............................................................................................................148 13.3 S_PULSE：设置脉冲定时器参数并启动....................................................................................152 13.4 S_PEXT： 设置延时脉冲定时器参数并启动 .............................................................................154 13.5 S_ODT：设置接通延时定时器参数并启动.................................................................................156 13.6 S_ODTS：设置掉电保护接通延时定时器参数并启动................................................................158 13.7 S_OFFDT：设置断开延时定时器参数并启动 ............................................................................160 13.8 SP：启动脉冲定时器 .................................................................................................................162 13.9 SE：启动延时脉冲定时器 ..........................................................................................................164 13.10 SD：启动接通延时定时器..........................................................................................................166 13.11 SS：启动掉电保护接通延时定时器............................................................................................168 13.12 SF 启动关闭延迟定时器.......................................................................................................170 Fehler! Formatvorlage nicht definiert. 用于 S7-300 和 S7-400 编程的功能块图 (FBD) 10 参考手册, 10/2010, A5E03290619-01 14 字逻辑指令.................................................................................................................................................173 14.1 字逻辑指令概述..........................................................................................................................173 14.2 WAND_W：单字与运算 (字) .....................................................................................................174 14.3 WOR_W：单字或运算 (字)........................................................................................................175 14.4 WXOR_W：单字异或运算 (字) .................................................................................................176 14.5 WAND_DW：双字与运算 (字)...................................................................................................177 14.6 WOR_DW：双字或运算 (字).....................................................................................................178 14.7 WXOR_DW：双字异或运算 (字)...............................................................................................179 A 全部 FBD 指令概述....................................................................................................................................181 A.1 根据德语助记符 (SIMATIC) 排序的 FBD 指令 ..........................................................................181 A.2 根据英语助记符 (国际) 排序的 FBD 指令..................................................................................184 B 编程实例 ....................................................................................................................................................187 B.1 编程实例总览..............................................................................................................................187 B.2 实例：位逻辑指令 ......................................................................................................................188 B.3 实例：计数器和比较指令............................................................................................................191 B.4 实例：定时器指令 ......................................................................................................................194 B.5 实例：整型数学运算指令............................................................................................................198 B.6 实例：字逻辑指令 ......................................................................................................................199 C 使用功能块图.............................................................................................................................................201 C.1 EN/ENO 机制 .............................................................................................................................201 C.1.1 加法器连接了 EN 和 ENO ..........................................................................................................203 C.1.2 加法器连接了 EN 但未连接 ENO................................................................................................204 C.1.3 加法器未连接 EN 但连接了 ENO................................................................................................204 C.1.4 加法器未连接 EN 和 ENO ..........................................................................................................205 C.2 参数传送.....................................................................................................................................206 索引 ...................................................................................................................................................................207
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