Xantrex Technology RS232-XPD - Manual (Page 22)

Installation and Configuration
Communications
20 Operating Manual for RS-232 for XPD Series Power Supply
Communications
Baud Rate
Selection
Serial transmission sends and receives data in bit streams at fixed bit rates. Both the
computer and the interface must have the same bit rate setting for proper
communication. Use switches B1, B2, and B3 on the rear panel S1 switch to select
the power supply's rate of transmission in bits per second. Table 2.2, “Switch S1
Settings for Baud Rate”summarizes the switch settings with the reference markings
on the rear panel subplate. Refer to Figure 2.2, on page 17 for the location of the S1
switch on the RS-232 interface subplate.
Table 2.2 Switch S1 Settings for Baud Rate
0 = OPEN/OFF 1 = CLOSED/ON
Note:When resetting switches B3, B2, and B1 during a working session, turn the
power supply OFF and then ON again to ensure that the new settings are put into
effect.
Flow Control
Selection
Flow control signals regulate data flow for proper communication. Use the FLOW
switch on the rear panel S1 switch to select flow control or to disable flow control.
With flow control enabled, you can use either software or hardware protocols to
control flow rates. Table 2.3 gives the FLOW switch settings with regards to the
markings on the subplate rear panel. For a diagram of the rear panel subplate, see
Figure 2.2, on page 17.
Table 2.3 Flow Control Section
Baud Rate B3 B2 B1
9600 1 1 1
4800 0 1 1
2400 1 0 1
1200 0 0 1
600 1 1 0
300 0 1 0
150 1 0 0
75 0 0 0
FLOW Switch Setting Condition
1 Disable Flow Control
0 Enable Flow Control