Joe Tauser

Take a look at the Advanced Webserver documentation - the datatable data type is not supported. You'll have to create an array of MI's and read it from there. I have looked into displaying a graph on the webpage and Ryan is correct - you'll have to create the graph with javascript code embedded in the webpage itself. Joe T.

If your SCADA software has a spot for the Slave ID set it to 255. Joe T.

I had that problem. If you have a file compression/decompression program such as Winzip use it to manually unpack the file into its components. Joe T.

+1 on that. I put surge suppression on all inductive loads, even plug-in octal relays. You'd be surprised how big of a spike they generate when they're turned off. Joe T.

Post your code so we can see how your function blocks are configured. Joe T.

I wouldn't put an anemometer inside a duct. A pitot tube is typically used with a differential pressure sensor to report air velocity- http://www.dwyer-inst.com/Product/AirVelocity/PitotTubes/SeriesPAFS-1000 http://www.dwyer-inst.com/Product/Pressure/DifferentialPressure/Transmitters/Series668 If you're not familiar with these do a little Googling to learn how they work. Joe T.

Connect the 24V ground to the 12V ground so you have a common reference. It won't hurt anything. Joe T.

Have you put a scope on the signal to see what happens when you connect the VDO gage vs the PLC? Which analog module are you using? What is the input impedance of the VDO? Could it be because the PLC analog input is common grounded and the VDO is floating or tied to the vehicle? Have you tied the PLC power supply common to the vehicle ground? Joe T.

Simon - your recollection is correct. I'm just looking at what I still have in stock. I'm also thinking that the gender between the CS25 and CS26/76 is different, which may be confusing as to which one is needed. The main point which you also make is that serial communications usually require a bit of experimentation with the cable to get them to work. Joe T.

The EI-1304 would do, but at 1 mV / deg F you don't have a lot of signal to work with. You may want to consider a thermocouple transducer that would give you a standard process output. Joe T.

You can actually install Visilogic more than once in separate Visilogic_C directories. The trick is you have to name each directory differently (i.e. Visilogic_C2) and rename the Visilogic.exe file something else in that directory (Visilogic2.exe). You can have both copies running at the same time, but you can not copy from one to the other. Joe T.

Are you running Windows 7? You may have to change ownership of the directory it's in. UAC really causes problems with the software. Joe T.

I think he probably needs a -CS26. If you look carefully at the Unitronics interconnecting cable with the RJ12 plugs on each end you'll see that the conductors are reversed in it, effectively creating a null modem cable. To talk to a device such as a scale you need to keep the RX and TX wires crossed. The -CS76 connector un-crosses them for the modem. If you're handy with a soldering iron or have a pin crimp tool you can make your own cable. Making "first contact" is always the hardest part of serial communications - read the Help on how the serial port on the Unitronics is wired. You're going to just have to take a deep breath and dive in to understand which signals need to be connected where on each side. Joe T.

Turn all data compression and error checking off. Unitronics doesn't like it. Joe T.

Unistream can talk to the ATC8 via an EX-RC1 over CANbus. Joe T.

Tell us what you've done so far. Joe T.

Assuming your inputs are DC, you can use a Jazz JZ20-R31. Look up the specs on the website and see if it will fit your needs. Hopefully you have the Mitsubishi program. Joe T.

The US Robotics modem may be adding error correction characters you don't know about that are causing the Sixnet modem to choke. You'll need to chase down the AT command set reference for you modem and issue a command to turn off error correction. There is a reason why I know this. Has this setup ever worked? Joe T.

This scale is not a modbus device. You are going down the wrong path - get rid of the modbus stuff. Read the Help on the Protocol Config and Scan blocks. According to the manual you can set the scale to continuously broadcast the weight, so you should be able to catch the string using Protocol Scan and then extract the weight from it. I have found it very helpful when dealing with a serial device to first connect it to a computer running a terminal program to get an idea of exactly what the strings look like. You can use this information to determine if you have the PLC configured correctly and where the data you want is in the string. Look at the example Projects->Communication "V130 Display String from Hyperterminal". It won't extract your weights, but it will get you started on talking to the scale. That's the hard part. Have a go at it and attach your program next time. We can do a better job troubleshooting the problem if we can actually open the code. Joe T.

You don't have to do a socket init for basic programming - socket 2 defaults to where it should be. You didn't expand your card init so we can't see what's in it. Can you post your program? Joe T.

Your code may be continuously triggering a display, which would hang it. Can you upload your program? Joe T.

Look at the "Set Bit" instruction under the Logic menu. This instruction sets a bit in an MI array. You could examine the bits with the "Test Bit" instruction (located in the same place) with a pointer incremented by your program after the user sets it up. Use the "Fill" instruction under the Vector menu and fill the MI array with 0s to initialize it. If you do it right you should be able to achieve what you want in just a couple of networks. Joe T.

Welcome to the forum! What brought you to Unitronicsland? 1. Simulation is not built into Visilogic. A third party has developed one - http://www.plc-apps.com/products/virtual-plc-simulator 2. Visilogic does not have tabs. 3. There is not a dedicated cross-reference area, but the Find tool will show all locations of an address, subroutine, or display. Joe T.

I had 1.0.0 - the program uninstalled it after I manually extacted it. On this box I'm running XP SP3 and Viper antivirus.

I downloaded 1.2.5 to play with over the Christmas holiday. When I tried to install it I got a message stating "There is not enough space on drive C:\ to extract this package." I used WinZip to manually extract the Unilogic Install file to a directory and was able to run the program from there. This appears to be a problem with InstallShield. The Creators will probably want to have a look at this. Joe T.