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Gabriel Franco

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Gabriel Franco last won the day on March 5

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  1. The simple answer is no, tag values are not lost.
  2. If the manufacturer offers EthernetIP, then you don´t need those ladder functions, just a few steps to configure the PLC as Ethernet/IP scanner importing the EDS of the device. It will create the structures and IO tags required to comunicate to/from the valve controller. Take a look to the examples that can be downloaded from https://downloads.unitronicsplc.com/Sites/plc/Unilogic/UniLogic_Examples.zip
  3. Verify that the total number of rise/fall bits used is not greater than allowed. Use View|rise/fall summary menu
  4. It is not very difficult to connect to the PLC and download the program to it (from Unitronics' perspective, download is from the PC to the PLC). You must have a USB mini B cable or serial cable and a USB-RS232 converter. But downloading the program doen´t load values to the parameters, as Flex mentioned. Parameters are saved in a separate file (txt or bop file) only if someone did it intentionally.
  5. Have you considered using a weight transmitter instead? It has been a cost-effective solution to me
  6. Some considerations: 1. You are skipping row 0. First Data tables row is 0. In your case, limits must be 0 ... 299. 2. ML9 returns the FIRST row where the InvoiceNO is found, or returns -1 if not found; not the number of times InvoideNO is present in the DB. 3. You don´t need to use find extended FB.
  7. According to the Alicat manual, "The device setpoint should be sent as a 32-bit IEEE floating point value. Setpoint values must be sent together in a Write Multiple Registers command. Any writes to only one half of the setpoint value will cause an error. Setpoint is ignored on devices without a controller". Are you fulfilling this requirement?
  8. Try changing the action trigger. To speed up the response, use press trigger mode.
  9. How quick? I have buttons responding in less than a second. Some time ago, I wondered how fast VNC (I use VNC viewer V.6.19.107 from Real VNC) responds connected to a USC, then tested using the PLC as a stopwach and got an average of 500 ms response time.
  10. I just tried and jpeg files are not seen. Changing the extension to jpg did the trick
  11. Operand values are battery backed-up and are not downloaded to PLC within application. For a complete backup, its recommended to export PLC operands to text/binary file and keep the file together with VLP file. I also include OS files.
  12. Electrical noise also can cause it. I´ve had a couple of machines suddenly loosing all or some parameters and only after doing proper electrical isolation did solve the problem.
  13. - As Aus stated, use RS485 cable. For now, try to connect idle pairs to ground. - Make sure terminal resistances are connected at both physical ends of the network. - Keep stub lines as short as possible. - Why are you using Scan32 rather than ScanEx?
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