LAbview 8.0 reading data from Denver Instrument Mass Balance

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Subhayan
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LAbview 8.0 reading data from Denver Instrument Mass Balance

Сообщение Subhayan »

Hi,

I am trying to read data from the Denver Instrument Mass Balance. I am using the "Basic Serial Read and write.vi" as the block diagram from Labview 8.0 help. But after all the connections it is only reading the bytes that are sent to the serial port and not the exact mass reading from the mass balance.

Please help me out with the vi.

Subhayan
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IvanLis

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Re: LAbview 8.0 reading data from Denver Instrument Mass Bal

Сообщение IvanLis »

Subhayan писал(а):Please help me out with the vi.
You must know the interface (baud rate, the structure of the transmitted packet) and a description of the protocol that is used for data transmission. Without such information will be difficult to implement the program independently.
Contact the manufacturer or its representative to provide such information.
Subhayan
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Re: LAbview 8.0 reading data from Denver Instrument Mass Bal

Сообщение Subhayan »

I know the baud rate etc. I am using a RS 232 port for the handshaking. I have synchronized the instrument with the software. My problem is should i change the flow control to RTS/CTS or XON/XOFF because the manual doesnot say anything about how the flow control should be. It's able to read the bytes but not the exact mass with the "Basic Serial Read and write.vi".
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IvanLis

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Re: LAbview 8.0 reading data from Denver Instrument Mass Bal

Сообщение IvanLis »

Subhayan писал(а):My problem is should i change the flow control to RTS/CTS or XON/XOFF because the manual doesnot say anything about how the flow control should be.
watch video, where I tried to show how interactions are managed signals


may need to control (switching) operation modes for your device, that is to include a mode in which the transmitted information
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mzu2006

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Re: LAbview 8.0 reading data from Denver Instrument Mass Bal

Сообщение mzu2006 »

Subhayan, You absolutely have to know the protocol for your device. I.e. you have to prompt your device to transmit that mass-balance data to you. Some of the protocols are proprietary, but call up a tech support first, they will likey point you to proper manual.

As with Xon/Xoff RTS/CTS there are only 4 possible combinations. try them all - chose the one that works.
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