S7-200 Download Program
Apolonio Hicks
It's a number of years since I last worked on PLcs and I don't want to corrupt or damage our running system. The aim is to eventually migrate the software across to an S7-1200 but first, of course, I need to understand the program. I have read the system manual but I'm still a little nervous.
As you can see from the screenshot below, the software has been phased-out since 2015.This means that the product is not available easily from Siemens (possibly as spare parts, but with an uptick on price...).
Start by contacting your nearest Siemens rep. for pricing and availability of Microwin, you have access to the Contact & Partners link at the right of this page to help you find him locally. There are also some equipment resellers that still offer Microwin as part of their inventory, such as this one (I am not approving this enterprise as a ressource, I only found them on the Web, you can search for more yourself and select among the hits by country and pricing delivery times).
So the landscape for Siemens PLC families and programming software can be quite confusing for a beginner, and when you ask for help on the forum you must always tell us which PLC and which software you are using.
And finally: there is no legal free programming software from Siemens, unless you count the trail versions of the softwares (fully functional for 21 days, after which you must purchase a valid license).
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As directly mountable or firmly attachable DIN rail devices, the adapters netLINK-MPI and netTAP-MPI replace expensive CP communication processors and allow programming, visualizing, and controlling S7-200, S7-300, or S7-400 PLCs via Ethernet.
The delivered driver can be integrated as a programming device (PG) into all well-known SIMATIC S7 engineering tools like STEP7 or TIA portal. The device is set up with the engineering tool or using conventional web browsers via the embedded web server.
Organized in a network, direct communication between two or several PLCs via Ethernet can be realized. PLCs can even be coupled without Ethernet port. Fully integrated PROFIBUS diagnostics and Master Class 2 DPV1 services allow the complete DP Slave device configuration and parameterization in STEP7.
Power is supplied by a 24 V DC connector. The S7 PLC directly supplies the netLINK-MPI connector with power. Since the contacts of connector and socket are connected with each other 1-to-1, the netLINK-MPI connector allows the trouble-free operation of further devices at the same MPI/DP bus.
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The conveyor system has a trolley which travels 40m in both direction in high speed. There were some hydrollic system on the trolley which use to clamp the aluminium profile and pull it out of the extrusion machine. The trolley use to automatically synchronized with the speed of the extrusion.
There was one more S7-200 plc in trolley system which use to control the hydrolic system in the trolley. Both the PLC in the trolley as well as the main panel were connected to each other through a bus bar system to exchange communication signals while the trolley was moving. Trolley use to have frequent breakdowns due to communication error between the plc.
I was given this task to make this system more durable. The first thing i did is replaced both the S7-200 plc with V130 PLC. In the trolley we installed the V130-j-TR20 and in main panel we installed V130-J-TR34 with IO_AI4_AO2. Then we developed a new program and synchronized every thing with the extrusion machine as it was before. V130-J-TR20 was in the trolley and V130-J-TR34 was in main panel and they need to be communicated with each other so that all trolley function should work. The previous system was bus bar system and was causing frequent problems, so i decided to go for a wireless communication system. I took two simple TP-link routers and installed one in trolley with v130-tr20 and other in main panel with v130-tr34. Then i setup a modbus ip link between them and exchanged all my signal between them. See the link of the video below
I fully agree with you that Unitronics is a cheap system and easy to program.
Also the help file in Visilogic is very clear in how to set up communications and with some effort you will succeed.
Another very positive feature is the info screen that can be used to see what kind of data is send over the available communication ports, serial and or Ethernet.
This is really a very helpful tool when programming and testing communication.
Unfortunately Unitronics is according to competitors not very reliable when used in noisy industrial application with for example frequency drives.
You will also find topics in this forum about this kind of behavior.
According to competitors this is because cheap not isolated print plates are used in a Unitronics plc??
We have about 20 Unitronics PLC,s in use for controlling small applications and the first one came in our plant at about 2005.
M90,s , V230 , Sambas , V350 and V570 are in use.
Never experienced problems but it can be because they are not mounted nearby frequency drives.
I have to agree with sgull. I have never had a field failure with Unitronics products and consider them on par with products that cost substantially more. Electrical noise can affect any electronic component and can be compensated for.
Only people who have also worked with Unitronics share the same positive opinion about the system that I have and all others in my environment seems to be stuck on big S no matter what they have to pay for soft and hardware.
Everyone has a bad story about every brand of PLC ever offered for sale if you use enough of them. I have had AB, ABB, GE, EZ automation, Automation direct, Moller, Eaton, Schneider, Siemens all fail at one time or another.
There are cases where the Unitronic's PLC has frozen or stopped working. I have had failures for water, H2S, lightening, power surges, line slaps, ambient heat, transformer explosions.... Etc. can kill anything. This is all par for the course if you install enough product. After installing upwards of a thousand PLCs (all brands) I can say that I really like the Unitronics PLC and it is dramatically more durable than other lower cost brands.
Variable speed drives are very electrically noisy and they affect everything on the same ground circuit and close physical proximity. We have 300-400 PLC units (JAZZ, V350 and V570) installed on VFD applications and the most common thing I have to fight on a regular basis is VFD noise messing with the RS232 or RS485 communications. Just like everything else in life sometimes grounding shields is good and sometimes it is bad, but I have never had a Unitronics PLC fail to work at all.
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