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DannyC

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  1. Hi, I am looking for something to send simple messages between a robot and a computer server. The robot has a DeviceNet master, and the server only takes Ethernet TCP messages, so the PLC will need to be able to function as a DeviceNet slave and Ethernet TCP. Is there anything suitable for this? I haven't seen anything that suggests Unitronics products support DeviceNet, happy to be proven wrong though. Many thanks in advance!
  2. Hi, We have a M91-2-T1 that we haven't used for a while, and have just got it out again recently. I am trying to communicate with the PLC via RS232, but cannot communicate with the PLC. I am using: USB to serial cable (Prolific, driver version 3.3.10.140), connected to; DB9-RJ11 cable which we made according to the pin assignments in the U90 software manual (we also have another one with the RxD/TxD reversed because we thought we had the two around the wrong way) I also tried using an older computer which has a RS232 port, and no luck there either, so that ruled out the problem of the USB to serial cable. I have checked the COM port and settings (reset everything back to default), and they all seem fine. Is there a way I can test if the connections are correct by say, use HyperTerminal to send commands to the PLC, or is there any way I can find out what the problem might be? Many thanks, Danny
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