Siemens CPU312 module

Dec 12th, 2013

CPU 312C is a kind of compact CPU, for the small-scale application that had very high expectations for processing speed. Integrate digital quantity to input / export, support to connect course directly.

Integrate the other uses of the technological project to include:

Frequency measurement
Cycle measurement
The pulse width is modulated

The installation of CPU 312C is as follows,

Microprocessor; The time that the processor deals with each binary scale order can reach 100 ns.
Expand the memory; 64 KB work more memory ‘ It is equivalent to probably Order of 21 K) ,Used for carrying out the relevant procedure, offer the abundant space for user’s procedure; SIMATIC miniature a storage card ‘ It is the biggest 8 MB) As the intersection of load and memory of procedure, allow event (including symbol and explanatory note) still Store in CPU.
Flexible expansion ability reaches 8 more pieces of module, (a row of structure)
MPI puts MPI interface and sets up 6 and S7-300/400 or and the connections of PG, PC, OP when some interface more at the same time at most. In these connections, keep a connection respectively for PG and OP separately all the time. Pass ” overall data news report ” ,MPI can be used for setting up the simple network that 16 CPUs make up at most.
Dispose input / export; 10 pieces of digital quantity are input (can be used for calling the police and dealt with) Export with 6 pieces of digital quantity, is used for connecting the process signal to CPU 312C.
Functions password protected; User’s procedure uses the password to protect, can prevent visiting illegally.
One is encrypted; Function (FC) With the functional block (FB) Can encrypt and store in CPU in order to protect the exclusively-owned technology through S7-Block Privacy.
Diagnose and buffer; Diagnose that buffering can store last 500 mistakes and cut off the incident in the district, 100 incidents among them can be stored for a long time.
The non-maintaining data are reserve; If cut out, can write all retentivity data into the miniature storage card (MMC card) to SIMATIC automatically through CPU Have, and will maitain unchanged while energizing again.

But parameter characteristic

Can use STEP 7 to set up the parameter to the configuration of S7, response of attribute and CPU:

Summary; It define name, at location name and position ID
Start; Define starting the characteristic and monitoring time of CPU
Circulation / clock memory; Appointed maximum cycle time and supporting, presume the clock memory address.
Memory; Set up the keeping area
Japan clock cuts off; Sets for initial date, initial time and separates by cycle
Cycle cuts off; Cycle presumes
Diagnose systematically; Confirm that diagnoses treatment and range of news
Clock; Presume the synchronous type in AS or on MPI
Protect the grade; Define the visit authorities of procedure and data
Communication; Keep and connect the source
MPI is some interface more; Define the station address
Digital quantity is input / outputted the address to presume, input relay and course to cut off
The integrated function ” The counter ” Presume the address, and ” count continuously ” ” single time is counted ” ” cycle counts ” ” frequency measurement ” With ” modulation of pulse width ” The parameter under the mode is distributed

Reveal the function and information function

State and trouble instruction; LED reveals, for example, and operational mode that hardware, programming, timer or I/O make mistakes, such as RUN, STOP, Startup.
Test the function; Use the programmable device, can reveal users carry out the signal state in the course, are independent of the variable of course of revision of user’s procedure, and output the content of the memory of the storehouse.
Information function; Offer the operational mode of storing ability information, CPU to user in the form of text through the programmable device, and main storage and it is of loading memory present operating position, before cycle time and content to diagnose buffering.

Integrated communication function

Programmable device / OP communication
Overall data news report
S7 basic communication
S7 communication (only a server)

Integrated function

Counter; 2 piece passway ( It is the highest 10 kHz) ,The comparator with independent direction, can connect the increment type encoder to 24V directly.
2 passways of frequency measurement; Allow to go on frequency measurement ‘ Up to 10 kHz) ,For example, measure the axle speed or throughput (each piece measured in cycle) .
Cycle measures 2 passways. Can measure the cycle to count the signal, it is 1 KHz to count the frequency highest.
The pulse width is modulated; 2 can connect and control valve, carrying out device, the switchgear, heating device,etc. to export directly, for example sampling frequency is 2.5 kHz. Can set up the intersection of cycle and length and can revise, take empty than during operation.
Call the police, input into ‘ All digital quantity is input) ; Warning to input the all right detection procedure incident, and touch off and respond to within shortest time.
Technical Specifications

6ES7 312-5BF04-0AB0

Products type of the hardware


Firmware type


Project configuration

Software package of programming

The intersection of STEP and the intersection of 7 V5.5 and + SP1 or high edition, the intersection of STEP and the intersection of 7 V5.3 and + SP2 or high edition (take HSP 203)

24 V DC

The electric current is consumed ‘ Specified value)


The electric current is consumed ‘ Empty load) ,Typical value


Assault the electric current, typical value

5 A

I² t

0.7 A² s

Consumption, typical value

8 W

Job memory


64 kbyte

Can expand


Size used for non-volatile memory of the non-volatile data piece

64 kbyte

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