chelton

Hi Bob, No I haven't received anything as yet? I think you have 1 of my other email address's you could try. If not I'll send it through to you anyway. Thanks

Example code would be a great help. I have not had to do any PMCR stuff yet so It's all new to me. Would it be best to use both SCU ports or would it be ok all off the 1 channel?

I will be communicating with 15 danfoss drives/softstarters, a 3 vlt5000's 6 fc302's and 4 mcd500's using modbus RTU. I was hoping to poll the drives status/control words continually, then other operating data such as power(kw's), motor thermal(%) at a longer interval. The vlt5000's have a max baud of 9600 whereas the newer models can go to 19200 so I may need to seperate the vlt's onto a seperate SCU or turn the newer models down to 9600. The plc is a cj2m-cpu33 with 1 cj1w-scu31.

Just came across this thread, I'm working with a similar setup at the moment, I'm fairly new to Omron and haven't used serial comms very much. To Scott or Bob, would it be possible to to have a look at the Cx-protocol file for this project? Thanks

This is on CX-Programmer help

Does anyone know of a way to prevent access to the web server on the modbus module? You do not even need an account/password to alter the setting from master-slave or change the ip-address Regards Chelton

I think to move bits 8-15 to bits 0-7 you could also use the swp instruction.

Is there another program/driver running on the pc that maybe using the same com port? Like AB software with DF1 driver?

A few things to check. For an onboard com port1 your Boards and ports form should look similar to the attached screen shot. Ensure there are no IO/Devices using this Port. Also the port can only be opened once. If the port is open and you try to re-open it it will return -1.

Could you call the macro on entry to one of the defined screens, then the time would sync with the plc transparently?

arpix, to pause/retain count you can use the TTIM/TTIMX timers.

The cicode is simplified, no error handling etc. But should give you something to work with.

What is the purpose of the ORW D102 D101 D102 in the example posted? Regards Chris

Bob, I replaced a faulty fibre link with 2 x nanostation m5 bridges. 100Mbps full duplex for less than $160ea at over 70 metres. Regards Chris

Bob, Have a look at Ubiquity Ubiquity Cheap, Reliable, Fast.

I think Pp might be referring to FVAL not FLTL. Used it on a recent project, works a treat.

I have a couple of 1794's still operating on different sites. They all have 1788-enbt/a's for comms with scada/hmi. What would be the best migration path and spares to keep? Thanks

Joe, I'm running the same VMplayer. But with win7_x64 host. Havn't had the problem happen to me on my XP_SP3 VM. with this: "Plug USB drive back in Drive mounts to host, not guest, even though "Automatically connect new USB devices" is checked (This behavior is not 100% consistent: sometimes it will connect as expected) Connect(Disconnect from host) USB drive from VM menu if it didn't automatically" I have found that is connects to the host or VM that has the input capture even if auto connect is checked.

PLCMentor Thankyou for the reply, Yes the systems are primarily flex i/o, i have plently of spares for the i/o modules, but do not have a spare processor that i could use to get the plants running again if needed. If using the aent and ethernet/ip, is ok to have scada comms using the same module or is it recommended to have separate networks? I think a control logix would be an overkill, the systems have only 6 digital i/o 2 analogue i/o with only small programs <600 rungs of ladder.

Have you tried using a different USB drive, from another vendor?

I have seen this approach using PID and PWM also. Does the PID have fixed P and ID values or are they changed dynamically as the pressure decreases? If you can trend all your data - chamber pressure, setpoint, output- PWM and PID for a complete cycle. Sometimes it looks a lot easier to see whats happening with a pretty graph.

If the school only has ver 5.5 and you will have to work on ver 5.5 also. projects are not backward compatable. You cannot create a project on ver 7.2 and run this on a ver 5.5 system. Download vmplayer or similar and install winxp then install ver 5.5 .

I'm pretty sure win 7 wasn't supported in citect until ver 7.2. You will have to run ver 5.5 on a vitual machine if using win 7.

I would assume you have called the SetDigitalAlarm() from the graphics page. If this is the case then while the page is displayed it is constantly calling this function. Try adding a sleep() time to the function, or create a new function that calls this funtion with tasknew()

I have a strange connection issue. Problem: I have cx-one ver 4.05 all up to date installed on windows 7 x64. When using my usb - serial converter a keyspan usa-19hs and I try to connect auto-online with serial using COM7 on my machine CX-programmer freezes. If I go to task manager and kill cx-programmer, cx-programmer closes but cx-server continues to hang on to the COM port. Then in task manager under processes there is a process called CXSDI_PortMan.exe *32 that is consuming 13% cpu load than i cannon kill or stop. The only way to get the com port back is to restart. BUT: On the exact same machine I have vmware player with a winXP vitual machine with exact same software and using the same devices it works perfectly.