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Thread: Hitachi seiki vs40 data transfer problems

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    Default Hitachi seiki vs40 data transfer problems

    We have a Hitachi seiki VS40 2001 model. We cannot download program data form computer to machine. We have been sending and receiving program data, but for some reason it has stopped. Our cable pins check out using a ohm meter. When we go to send program data from computer to the machine, computer tells me it is waiting on signal. At the machine it reads ( EXT. DEV. ---> NC MEM. ) blinking. When we go to send program data from machine back to the computer, the machine sends data, but it is not received at the computer. Computer has a 9 pin output, goes to a 9pin to 25 pin adapter, then to the RS232 port on machine. The data transfer settings are the same on the computer and machine. Are there any way to check data flow. Please help!!!!!!

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    Default Re: Hitachi seiki vs40 data transfer problems

    Quote Originally Posted by CLYNN View Post
    We have a Hitachi seiki VS40 2001 model. We cannot download program data form computer to machine. We have been sending and receiving program data, but for some reason it has stopped. Our cable pins check out using a ohm meter. When we go to send program data from computer to the machine, computer tells me it is waiting on signal. At the machine it reads ( EXT. DEV. ---> NC MEM. ) blinking. When we go to send program data from machine back to the computer, the machine sends data, but it is not received at the computer. Computer has a 9 pin output, goes to a 9pin to 25 pin adapter, then to the RS232 port on machine. The data transfer settings are the same on the computer and machine. Are there any way to check data flow. Please help!!!!!!
    You have to determine where the problem exists; with the control, or the PC. The quickest and cheapest method is to purchase a RS232 test plug, available from most good electronics stores, or via the Internet. This test plug normally has LEDs (see attached picture) that indicate activity on the signal and control lines of the RS232 device. There will be instructions on its use with the device, but briefly, it plugs between the control and PC and indicates activity, if it exists, when data is transmitted.

    The device pictured is a DB25 unit. When using this device, you should see activity on Pin 2 (TD) of the Sending Device when data is being sent, and on Pin 3 (RD) on the same device when data is being received by it.

    Click image for larger version. 

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    Regards,

    Bill

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    Default Re: Hitachi seiki vs40 data transfer problems

    Thanks, I have found one on-line and placed the order, should have it in a couple of days. Thanks again.

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    Default Re: Hitachi seiki vs40 data transfer problems

    We can Download a program from the CNC to the computer, but we can not upload from the computer to the CNC. We have a tester with lights that indicates we are sending data to the CNC, but only receive a few ramdom chacters display on the screen at the CNC, that have nothing to do with the data in the program. Everytime we upload we receive different ramdom chacrters. We are using a new cable that is approx. 10 feet long connecting the CNC to computer. We have uploaded and downloaded in the past without problems. Does anyone have any suggestions? Please help.

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