Section 5. Programming the Datalogger

First Command Option (Parameter 5)

Handshake mode

Stop bits + parity Data length

Baud rate

x x x x

Handshake Mode:

0Leave as set previously

1DTR always set, set RTS when data is available to transmit, only transmit if CTS is set

2DTR always set, RTS always set, only transmit if CTS is set

3DTR and RTS always set, ignore CTS

4XON/XOFF data flow control

9

No automatic handshake (leaves lines in previous state)

Stop Bits and Parity:

0Leave as set previously.

11 stop bit no parity.

21 stop bit even parity.

31 stop bit odd parity.

41.5/2 stop bits no parity.

51.5/2 stop bits even parity.

61.5/2 stop bits odd parity.

Data Length:

0Leave as set previously

15 data bits

26 data bits

37 data bits

48 data bits

Baud Rate:

0Leave as set previously

1300 baud

2600 baud

31200 baud

42400 baud

54800 baud

69600 baud

719200 baud

832400 baud

976800 baud

Second Command Option (Parameter 6)

NOTE

NOTE

This option is used to set the handshaking delay in units of 50ms. The accuracy is -50ms, +0ms. The range is 0-254, with 255 reserved for XON /XOFF mode. XOFF will force the SDM-SIO4 to wait indefinitely for an XON.

When the SDM-SIO4 is reset from the ‘command line’, the ports are set to 9600 baud, 8 data bits, 1 stop bit, no parity and no handshake as the default.

A 1ms delay is required after Command 2049 before the next SDM-SIO4 command is initiated.

5-11

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Campbell Hausfeld SDM-SIO4 manual First Command Option Parameter, Second Command Option Parameter