Joe Tauser

If you want to post your code we can have a look at it. Joe T.

Open the Help Menu on the U90 software and look at Sample U90 Projects->Examples ->PID. There are several programs you can look at. Joe T.

Do you have documentation on their Modbus TCP? Usually port 502 is used for this. Joe T.

Data tables are not really a database, but you can search for a value in a column. Look in the Help on "Data Table Find" Joe T.

The cable that you need is part number MJ10-22-CS25. The V230 should have come with it. If you want to make your own the pinout is detailed in the Help. Joe T.

Are you looking to do PID or on/off control? Joe T.

Set SI 101 to 10. Joe T.

Are you able to talk to a different V350 with your PC? Joe T.

The Vision series does not support EtherNet/IP. You'll have to upgrade to a UniStream to do this. You can use the Turck unit with the existing system by setting it up as an Modbus IP slave and mapping bits to it in your program. Joe T.

If Flex's suggestion doesn't solve your problem then post your program. Joe T.

Take the Socket Init blocks out of both programs. I don't think you need them. Joe T.

The value shown on the ladder diagram will not be updated but the new preset will be there. To test this, go online and click on the timer. The new preset should be listed in the dialog box. Note that if you download the ladder again, Visilogic will notice this and ask if you want to upload the PLC value. If you don't click the PLC check box it will download the value you have on your saved program. Joe T.

Details on the IP camera manufacturer and model? Joe T.

To answer your question - yes, the Samba only does two loops. You may want to reconsider whether you need PID at all for an HVAC system. Often people think they need PID control when on/off control will do and is much simpler. You're probably trying to control to 1% humidity, which is actually impossible because most humidity sensors are accurate to +/- 2% RH. In addition, it probably takes a while for the environment to react to the humidifier or dehumidifier being turned on, so if you turn it off when the setpoint is reached (on/off control) it probably won't overshoot. Ditto on the temperature. There are a lot of "probably"s in my comment. Let me know if I've made incorrect assumptions about what you're doing. Joe T.

Make sure your baud rate is set to 115200 if you are trying to talk to a V350. Joe T.

Try seeing what is actually happening by doing an STL View of the network - right click on the network number itself and select "STL View" from the drop-down menu. Often Visilogic will re-compile a large network and create local internal bits to run the logic. You'll know it's doing this if you see LB 0 in the resulting statement list. This is a downside of what Visilogic allows you to do by stacking outputs in series - it doesn't always work the way it looks like it should. The previous posts are probably correct - the PLC is probably solving mini-rungs and your reset of MB 49 has killed your STO block. Joe T.

Search the Help for "bootstrap" and "Info Mode". Joe T.

Use an EX-A2X, which will support up to 7 modules of local I/O. It comes with a 1m cable. Cables are available in other lengths up to 20m. Joe T.

If you connect to COM 1 with a serial cable the Visilogic PCOM protocol will override Modbus. Plug in and see what happens as Aus describes. Joe T.

Your equipment picks are a good start. I'd recommend looking at the IO-AO6X for your units with analog outputs - it has six outputs on one module. Use the IO-AI8 for your analog inputs. I'd also look at standardizing on a PLC model and stay away from the Jazz if all these are going to be networked together. Since you've already got expansion I/O in the works, I'd use a V430-J-B1 (no onboard I/O) and keep all your wiring on the subpanel. Unless you've got a good reason you haven't mentioned, running a bunch of the I/O wiring up to the door where the PLC is can be a pain in the butt. Joe T.

The Samba series is a fixed I/O unit by design. As you've pointed out, by the time you buy the CANbus card and expansion parts you'll have put yourself into V700 land if you use a fully Unitronics solution. The cheapest way to go would be to get the serial card and find a low-cost Modbus I/O module. Joe T.

The V230 is an older unit with the Standard instruction set. It's not very powerful when it comes to numbers. You'll have to upgrade to one of the newer units with the Enhanced instruction set. If you were to open a new project in Visilogic and select a V570 or bigger you could explore the floating point operations and see if they will fit your needs. If you're stuck with the V230 then you're kind of out of luck. Joe T.

It's all the way at the bottom. Joe T.

This is really a Visilogic question, but I can't move only one thread. You can force an input on or off by first clicking on it while online. The little status dialog box will pop up. Right click on the dialog box and you'll get a small menu allowing you to force the input on and off, as well as cancelling the force. Joe T.

Post your code. Joe T.