概述
功能强大的 SIMATIC S7-400 CPU
适用于对性能要求很高的工厂
带 2 个 IF 模块的插槽
应用
The CPU 417-4 is the most powerful SIMATIC S7-400 CPU. The integralPROFIBUS DP interfaces permit direct connection to the PROFIBUS DPfieldbus as master or slave.
Two further DP master systems can be connected via theIF 964-DP interface submodules.
Note :
Only the interface module 6ES7 964-2AA04-0AB0 canbe used.
设计
CPU 417-4 的特性:
功能强大的处理器:
CPU 执行每条二进制指令时间仅为 0.018 µs。32 MB 工作存储器(程序和数据各 16 MB);
快速工作存储器用于对于执行十分重要的用户程序部分。可灵活扩展:
多 262 144 点数字量输入/输出和 16 384点模拟量输入/输出MPI 多点接口:
通过 MPI,可方便地将多 32 个站联成网络,数据传输速率可高达 12 Mbit/s。该 CPU 可与通信总线 (C-bus) 和MPI 的站之间建立多 44 个连接。
注意:
如果 PROFIBUS DP 接口和 MPI 接口运行,那么只能将以下总线连接器连接到 MPI 接口:带插口:6ES7 972-0BB42-0XA0
不带插口:6ES7 972-0BA42-0XA0
模式选择开关:
拨位开关设计。诊断缓冲区:
后的 120 个故障和中断事件保存在一个环形缓冲器中,用于进行诊断(可扩展)。实时时钟:
CPU 的诊断报警带有日期和时间标记。存储卡:
用于扩展内置装载存储器。存储在装载存储器中的信息包括 S7‑400 参数数据以及程序,需要 2 倍的存储空间。其结果是:内置的装载存储器不能满足大程序量的要求,需要存储卡。
可使用 RAM 和 FEPROM 卡(FEPROM 卡用于保持性存储)。PROFIBUS DP 接口:
通过 PROFIBUS DP 主站接口,可以实现分布式自动化组态,从而提高了速度,便于使用。对用户来说,分布式 I/O单元可作为一个集中式单元来处理(相同的组态、编址和编程)。
混合组态:SIMATIC S5,SIMATIC S7 为 PROFIBUS 主站,符合 EN 50170 标准。
注:
当使用 PROFIBUS DP 和 MPI 接口时,只能将下列总线连接器连接到 MPI 接口:
两个附加插槽:
可用 IF 964-DP 接口子模块连接两个附加的 PROFIBUS DP主站系统。
功能
Block protection:
a password concept also protects the user program from unauthorizedaccessIntegrated HMI services:
The user only has to specify the source and destination of the datawith HMI devices. The data are then transported cyclically andautomatically by the system.Integrated communication functions:
PG/OP communication
Global data communication
S7 standard communication
S7 communication
The STEP 7 tool "Hardware configuration" can be used to program theproperties and response of the S7-400 including the CPUs, e.g.
Multipoint interface MPI:
Definition of node addresses
Startup/cycle behavior
Stipulation of the maximum cycle time and communication load
Address allocation:
Addressing of I/O modulesRetentive area:
Definition of the number of retentive bit memories, counters,timers, data blocks, and clock memoriesSize of the process image, local data
Length of the diagnostics buffer
Protection level:
Definition of access authorizations to program and dataSystem diagnostics:
Definition of the handling and scope of diagnostics messagesTimed interrupts:
Setting of periodsConfiguring
Status and fault indicators:
LEDs indicate internal and external faults and operating modes suchRUN, STOP, restart, test function, etc.Test functions:
The PG can be used to display signal states in program execution,modify process tags irrespective of the user program, read out thecontents of stack memories, run separate program steps and inhibitprogram components.Information functions:
The PG can be used to provide the user with information about thememory capacity and operating mode of the CPU, and the currentutilization of the working and load memories.