Shanghai Automation Technology Co., Ltd. Li Hui (Siemens sales agent) Contact: Xu, Li Hong (sales engineer) 24-hour sales technical service hotline: 15021672309 Telephone (Tel) :021-33737848 fax (Fax) :021-33737848 E-mail (Email): 780099838 @ qq.com Business (QQ): 780099838 QQ: 780099838 Totally Integrated Automation (TIA) in the entry-level CPU performance for a moderate course requirements needed to run small applications CPU SIMATIC Micro Memory Card (MMC). CPU 312, the smallest S7-300 CPU. TIA to meet the ideal package for simple applications, such as integration to achieve communications, data management and diagnostic advantages. You can use MPI or CP networking, but the standard is a stand-alone application - non-network operation. I / O is usually a centralized configuration structure connecting CPU 312 is installed: a microprocessor; processor time per binary instruction up to 100 ns?. ? Extended memory; 32 KB RAM associated with the implementation of high-speed block (equivalent to about 10 K instructions) can provide sufficient space for the user program; SIMATIC Micro Memory Card (up to 4 MB) as the load memory program also allows projects (including symbols and comments) are stored in the CPU. ? Flexible expansion capabilities; Up to 8 modules (1 row structure) MPI multi-point interface;? Integrated MPI interface can create up with S7-300/400 or programming device, PC, OP of 6 simultaneous connections. In these connections, is always reserved for the programmer and OP were a connection. By "global data communication", MPI can be used to create up to 16 CPU consists of a simple network. ? Functions password protection; user program is password protected to prevent unauthorized access. ? Diagnostics buffer; diagnostic buffer can store the last 500 errors and interrupt events, of which 100 events can be long-term retention. ? Maintenance-free data backup; If power failure occurs, the CPU can be maintained all the data is automatically written to the SIMATIC Micro Memory Card (MMC card) and will remain unchanged when the power again. The feature can be parameterized using the configuration, attributes, and the CPU in STEP 7 S7's response parameter settings: MPI multi-point interface; define the station address restart / cycle time characteristics; maximum cycle time and load restrictions, and self?? ? detection clock memory; setting address protection class;? defined programs and data access system diagnostics;?? process and define the scope of diagnostic alarms watchdog interrupt; period set the clock interrupt;? set the start date, start time and the interval period and information display functional status and fault indication;?-emitting diode display, for example, hardware, programming, timer or I / O error and operating modes, such as RUN, STOP, Startup. ? Test function; programmer can be used to display signal status during program execution, and can not be modified by the user program process variables, and the output stack contents. ? Messaging; You can use the PG in the form of plain text storage capacity and access to CPU operation mode, the current utilization of main memory and load memory as well as information about the current cycle time and the diagnostic buffer contents. ???? Integrated communication functions PG / OP communication Global data communication S7 basic communication S7 communication (only server) system functions with a wide range of system CPU features, such as: diagnostics, parameter assignment, alarm, timing and measurement.