Siemens SG-6048-01 manual Operating in Manual Mode

2 Setting Up the Converter

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Figure 2.4 Rear Panel

The BAUD thumbwheel switch selects the data rate for communications. Set the data rate to be consistent with the data rate for your system’s SEAbus communications network.

Table 2.1 Tx Control Baud Settings

Dial Number	Data Rate (bps)
1	1200
2	2400
3	4800
4	>9600

2.5.2Operating in Manual Mode

Set the converter to manual mode since most Siemens application software uses RTS to enable the Isolated Multi- Drop converter’s transmitter. (If your software does not use RTS to enable the transmitter, refer to your user’s manual for more information.) When the Isolated Multi-Drop converter is connected directly to a PC, the MAN/AUTO switch must be set to MAN and the DCD/RTS switch must be set to RTS. When the Isolated Multi-Drop converter is installed at a remote location using short-haul modems, the MAN/AUTO switch must be set to MAN and the DCD/RTS switch must be set to DCD. Short-haul modems typically pass RTS through on the DCD pin at the remote modem.

2.5.3Operating in Automatic Mode

Set the converter to automatic mode if you use application software that does not support hardware handshaking (that is, DCD/RTS) or that communicates to a remote location via a dial-up modem on a nondedicated telephone line. With the MAN/AUTO switch set to AUTO, the converter’s transmitter is enabled by the data signal transmitted from the computer. To set up the Isolated Multi-Drop converter for Automatic mode, the MAN/AUTO switch is set to AUTO, and the BAUD thumbwheel switch is set to match the data rate on the communications network.

Siemens Energy & Automation, Inc. 3