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Hi  I would like to get acquainted with PLC and embedded webpages. Where do I start? Tutorials? (I know the basics of CX-programmer and step 7) Do I have to know HTML? or some other software? Which cheap PLC is suitable for some experimentation.   Thank you  

Hi We got 2 laptops Laptop1 communicates with a CJ1M and a C200H PLC. No problem. Laptop 2 communicates only with  the CJ1M, Not with the C200H, Same program, same conditions. I also tried with "Direct online" but no succes How can I get laptop 2 also to communicate with the C200H? Thanks

Hi My Firm just purchased a Simatic Field PG but nobody here has some decent knowledge about it. It had only been used a few times to make a connection with an external programmer but wasn't present at that time.  I attended a step 7 course about 10 years ago so now I would like to fresh up my knowledge and use it to debug issues (I'm a maintenance technician).So I took the field PG and some used hardware at home and would like to play with it BUT I can't get no connection with the PLC. My hardware setup: Siemens Field PG with Step 7 V5.5 + SP4 available cables: - a siemens cable DB9 male to DB9 male                               - USB/PPI Multimaster Cable   9SE7  901 - 3DB30-0XA0          USB to DB9     (the 3 LED's light up on connecting the USB but that's it) PLC:   SITOP Power 5   6EP1333-1SL11            SIMATIC S7-300  CPU313      313-1AD01-0AB0            MMI card      MC951/16KB/5V flash    6ES7 951-0KD00-0AA0           DI32 x DC24V            6ES7-321-1BL00-0AA0           DO32 x DC24V/0.5A        6ES7-322-1BL00-0AA0           AI8 x 12bit       6ES7-331-7KF01-0AB0 The current PLC configuration and program doesn't match with this hardware configuration so the SF is on How do I get started (step by step details please)   Thank you  Happy Newyear    

Thank you But, Aaargh, No MPI adapter at hand. Can you tell me what the PPI adapter and the DB9 cable is used for?

Thanks for the reply but: I connect with the PPI adapter. When I click "upload station to PG", I get a message: (when PG/PC interface is set as:   PC adapter.Auto.1)     The connection to the module could not be configured.   (when PG/PC interface is set as:   PC adapter.PPI.1)       With the set interface configuration, communication in Step 7 is not possible.    Then opens a window SELECT NODE ADRESS, in which I click on the View button: With the set interface configuration, communication in Step 7 is not possible so I click OK and then I get Online: communication link to the adapter damaged. (no LED goes on, on the adapter)   I tried some other PG/PC interface settings but no succes? Nor with the serial cable.

Hi For a machine, when a fault appears, I would like to output (12,07) a pulse with variable lenght (T30)according to the fault (word 250) So please take a look at the prg in attachment, section DISPLAY, -In rung 1 to 33 a value is stored in word 250 when a fault appears, -At the end of the section: timer 30: The timer changes value when another fault appears, but the timer keeps on re-running so the puls never ends, -At rung 34(313) I can't get marker 210,11 set, So the output KEEPs getting high Please help me. What am I missing? Or is there a better way to do this? Thank you   Labeler.cxp

Thank you for the effort, Your remark are worth mentioning but I found the main reason: (took me a few extra hours) Words 250 and 251 are in the SR memory area which is used by the PLC itself. So lesson learned: when using memory, always check out the appropriate memory areas

Hi I put value #80 in word 60 I run timer 2 with word 60 I replace word 60 withe the value #10 I run timer 2 again with word 60                       but you see the timer counting down from 80 instead of 10 So the timer runs first the previous value of word 60 before he runs with the new value although you see the new value of word 60 appearing in the timer. How can I let the timer run immedeatly with the new value.   Thank you

actual situation  CQM1 : Move value 80 to word use timer with word:           timer counts from 80 Change value 10 to word next--use timer with word:       timer still counts from 80  one time before it uses value 10 In the timer instruction i see the value is set to 10 but it still counts down from 80 (one time) The timeruses the new value only when it has been set

At the moment of writing into words the timer is'nt started yet. MOV #10 TIM2  doesn't work    destination can't be timer counter   I have 32 conditions. on the appearance of each condition i need one output pulse of a different lenght   I could use 32 timers  

Thanks, but i want it to work from the first time

Hi Is it possible to print some kind of a front page of a cx project? With, in large, the projects name and some additional data. Thank you

FWIW Today I try to reconnect my laptop to my CQM1 trough a USA-19HS converter and had some problems. Because something? went wrong in the beginning, CX prog. freezed everytime a tried to make connection. Solution: in task manager, I saw my cpu was busy 100% all of the time. In task manager> processes were 2 CX***??? processes still higly active even when cx-prog was shut down. So I stopped these 2 and got easily connected. I also had to set the converter to COM1 in device manager.

Hi I never worked with rs232. I would like to control a simple (running)LED display with the serial port on my CQM1 cpu21. But this port is also used for programming. Please help me getting started Thanks

It took me a while to find out what you meant but now I do feel a bit silly A high EQ flag will not be reset if the following CMP instruction isn't executed. Thank you remark: Differential monitoring doesn't seem to monitor bits that change during scan but only bits that change after IOrefresh?

Hi, please take a look at my domotic prg for my house at the last but one section "tuinlicht" DM0 is used for a timing function and at certain times 100.12 should go on and off. it goes on at 05h25 or in the evening when it gets dark(with an astronomical clock on input0.10 It goes off at 05h45 or at 22h40. At nighttime 100.12 is off but i notice that during daytime, 100.12 is still on. Even more: ik can't turn this output off with PLC>SET>off. When I use differential monitor on 100.12 rising edge and I SET 100.12 off, thisn output is set on the next scan but when I use the diff monitor on the inputs to set 100.12, nothing changes. 100.12 is not use elsewhere and word 100 is not used So how is this possible andhow to find this bug? thank you PLC kolfstraat 3.cxp

Hi In my program I use ADD 200 #1 200, which is executed every minute (on diff up on 1 min pulse) somewere else I use the CMP to compare this word with a value (no separate bits of 200 are used) For testing purposes, I can't wait for this word to become 1200 so in monitor mode, I do : ALT 3 en type the adress 200, select it, menu PLC SET VALUE and I set this word to 1200. But in my ladder under the "200" - where should be the actual value -, "error" is shown? I can't seem to set this value higher then 99? (not sure of the 99), alltough in the ALT3 pane the new value appears What could be the reason of this "error"? Also, if this situation stays for a while, I get communication error and CX programmer freeses I have to restart my laptop to get things working again. Thank you

Thank you IO, it seems to be OK now The DEC BCD HEX formats tricked me. To little experience I guess. I also took your advice and used DM0 thanks

I just saw that word 200 is in a memory area intended to be used fo rplanned function expansion. Could this be a reason Will do some testing tomorrow. help is still appreciated

Hi We have a small labeling-machine in 2 parts. Part one contains a CQM1 PLC and some sensors and valves/cilinders. The other part contains some sensors and valves/cilinders. Part one and two are connected withe a simple connector. Now they want to use part one with a new part three, again containing sensors and valves/cilinders in different configuration. A wire bridge in the connector of part 3 tells the PLC which part is connected. What the best way to program: if input x is on: Program one is executed. If input x is off: program two is executed In both programs some in- and outputs are used for the same detections/actions, some for other detections/actions In program one interrupt is used. Tips are welcome Thank you

Hi I was thinking of using a simple clock switch on an input to sychronise the PLC time so I can use many time switching contacts. I have no memory cassette so I don't have a RTC, right? In the CQM1 I can only see Time conversion instructions? Can you show me a way to set up a self made 24hclock to use? Seconds are not necessary. Thank you

That was the idea. I have an external double(astronomical)clock of which I planned to use 1 switch on 1 input to sync the PLC clock(counter) and 1 switch (the astronomical one) the tell the PLC when it is getting dark. Using a counter as clock is indeed the most simple solution I guess, when nothing else is at hand. with a well documented program this should not be a problem. Thanks for the replies

Hi I'm getting desperated by now I'm trying to program my keyence kv 40 Laptop W7 64 bits no serial port I installed virtualbox an vmware player with a xp pro 32bits in it I use a Tripplite keyspan USA 19HS USB to rs232 converter I come to a point that i see the USBrs232 converter do something, but my KV ladder builder keeps saying: communication problem I first thought virtualbox was the problem but vmware doesn't helpme either Maybe you can please

In device manager I first saw COM1, COM2, tripplite USB onverter on COM3 and LPT 1 I' ve tried with com 1 baud rate auto no succes, parity bit set to even no succes. There was no activity an the converter, The Led on the converter was blinking constantly In KV builder I could only choose between COM 1 and 2, I chose COM1 Then (in devicemanager) I've switched COM 1 to COM 4 and the USB converter to COM1 Then there was communication (the green Led flickering) but something is still wrong, result: the error message "a communication problem uccured..."

Do I have to install the adapter in the Windows 7 host which is an 64 bit OS though the kv laddersoftware only works in an 32 bits OS? Or should I install it in the virtual XP?