如何确定一个VI的参数序号顺序？
How to determine the argument number order of one VI?
我遇到了一些错误，例如 "error from Property Node (arg 8) in VISA Configure Serial Port." 如何知道哪个 arg 是 arg 8？，哪个是 arg 1 等等
这是流量控制。
Specifies the flow control method used for both transmitting and receiving data. Valid values include: (0) Flow None, (1) Flow XON/XOFF, (2) Flow RTS/CTS, (3) Flow XON/XOFF and RTS/CTS, (4) Flow DTR/DSR, (5) Flow XON/XOFF and DTR/DSR. Certain values or combinations of values may not be supported by all serial ports and/or operating systems.
(0) None—Does not use flow control, and buffers on both sides of the connection are assumed to be large enough to hold all data transferred.
(1) XON/XOFF—Uses the XON and XOFF characters to perform flow control. The transfer mechanism controls input flow by sending XOFF when the low-level I/O receive buffer is nearly full, and it controls the output flow by suspending transmission when XOFF is received.
(2) RTS/CTS—Uses the RTS output signal and the CTS input signal to perform flow control. The transfer mechanism controls input flow by unasserting the RTS signal when the low-level I/O receive buffer is nearly full, and it controls output flow by suspending the transmission when the CTS signal is unasserted.
(3) XON/XOFF and RTS/CTS—Uses both values 1 & 2.
(4) DTR/DSR—Uses the DTR output signal and the DSR input signal to perform flow control. The transfer mechanism controls input flow by unasserting the DTR signal when the low-level I/O receive buffer is nearly full, and it controls output flow by suspending the transmission when the DSR signal is unasserted.
(5) XON/XOFF and DTR/DSR—Uses both values 4 & 5.
请看图
我遇到了一些错误，例如 "error from Property Node (arg 8) in VISA Configure Serial Port." 如何知道哪个 arg 是 arg 8？，哪个是 arg 1 等等
这是流量控制。
Specifies the flow control method used for both transmitting and receiving data. Valid values include: (0) Flow None, (1) Flow XON/XOFF, (2) Flow RTS/CTS, (3) Flow XON/XOFF and RTS/CTS, (4) Flow DTR/DSR, (5) Flow XON/XOFF and DTR/DSR. Certain values or combinations of values may not be supported by all serial ports and/or operating systems.
(0) None—Does not use flow control, and buffers on both sides of the connection are assumed to be large enough to hold all data transferred.
(1) XON/XOFF—Uses the XON and XOFF characters to perform flow control. The transfer mechanism controls input flow by sending XOFF when the low-level I/O receive buffer is nearly full, and it controls the output flow by suspending transmission when XOFF is received.
(2) RTS/CTS—Uses the RTS output signal and the CTS input signal to perform flow control. The transfer mechanism controls input flow by unasserting the RTS signal when the low-level I/O receive buffer is nearly full, and it controls output flow by suspending the transmission when the CTS signal is unasserted.
(3) XON/XOFF and RTS/CTS—Uses both values 1 & 2.
(4) DTR/DSR—Uses the DTR output signal and the DSR input signal to perform flow control. The transfer mechanism controls input flow by unasserting the DTR signal when the low-level I/O receive buffer is nearly full, and it controls output flow by suspending the transmission when the DSR signal is unasserted.
(5) XON/XOFF and DTR/DSR—Uses both values 4 & 5.
请看图