-
what are the various possible way of communication with OP27. how to check transfer setting as unable to enter transfer settings??

 
1. Power OFF.
2. Keep pressed ESC+Aroow UP
3. Power ON.
4. System switches to Download Mode. (you will see a message).
5. Release the buttons.


************************************************************************************

I am using   Siemens PLC (S7-200 CPU  .Micro Win V4.0  SP 8, and for communication  am using ppi adapter.the plc can not communicate with the computer .it gives me
  "The port cannot be opened, or  is being used by by another application.

Shutdown all applicatons, look in your startup folder for applications that might use the same (pc) port.
Restart PC.
Start microwin and select right pc/pg interface.
Put CPU in stop mode and try again. 

Comments

Post a Comment

Popular posts from this blog

Why 27648 Analog Maximum Value in Siemens PLC???

-
Analog module in Siemens convert voltage (or other) into integer 16-bit (word data type), so it have 2^16 = 65536 count. Analog module in Siemens comes with varies bit-resolution 8-15 . So for max count (15 bit) it have 2^15=32768 count (0...32767).  PLC always convert voltage (or other) into word value regardless the resolution and its conversion is shown below:   Volt:    0....10         into Count: 0.....27648 although the rated range is 0-10V (0-27648), PLC also have over-control range (27649-32511), and overflow (32767). Noted that 27648 is not analog maximum value, its the analog rated maximum value. The real maximum value is 32767 (overflow) -> 2^15. So if you give module's input 10.2V it will convert into value bigger than 27648 and not destruct the module (as long as it still below permissible input voltage). But i still don't know why Siemens choose 27648 not 27000 or other (maybe rated range 84...
Read more

Basics Of S7-400

-
Image
Above Picture is basically of CPU41x-1. In this one port X1 is present and accordingly  LEDs are present. X1 port is of MPI/DP. Near to MPI/DP serial number of CPU is present which in further helps in getting manufacturing data. Mode selector switch is used to change CPU mode manually. We can make it either RUN/Stop/MRES.   LED indications help in determine the status of CPU, fault diagnosis at glance. Details diagnosis can be done through CPU Module information option available in PG step 7.   Memory card slot is used to insert memory card of two type: a.     FLASH card.             b.    RAM card.   External Battery connector is used to supply voltage to CPU through external supply range from 5 V-15 V in case of change of power card. This is used to maintain the program in the RAM and also to maintain values at counter, timer etc. It requires 2.5 mm Jack and to check the polarity as shown be...
Read more

The Advance PLC: Simatic S7-1500

-
Image
                                                    Simatic S7-1500 PLC   Overview Modular, scalable, and universally usable system in IP20 level of protection The system solution for a variety of automation applications in discrete automation Highest performance with excellent usability Configurable exclusively in the Totally Integrated Automation Portal with STEP 7 Professional V12 Performance Performance increase through Faster command execution Language extensions New data types Faster backplane bus Optimized code generation Powerful communication: PROFINET IO (2-port switch) as standard interface Optional additional PROFINET interface, e.g. for network separation Expandabl...
Read more