Xylem H-264 - Manual (Page 10)

ASI v2 Operations (PRELIMINARY)
Operational Mode, DIP Switch Selection Settings
For changes in DIP switch settings to be effective, the ASI must be RESET after new switch
settings are entered. A RESET is done by either depressing the RESET switch on the ASI
board for 5 seconds or by powering the ASI board off for at least 90 seconds.
Baud Rate & ASYNC/SYNC selection
Switch 1 Switch 2
Open 0 Open 0 ASYNC (LL or RS232) 300 Baud
Closed 1 Open 0 ASYNC (LL or RS232) 1200 Baud
Open 0 Closed 1 ASYNC (LL or RS232) 4800 Baud
Closed 1 Closed 1 SYNC SERIAL (LL SCLK & LL DATA Input only)
Incoming Message Format
Switch 3 Switch 4
Open 0 Open 0 ALERT binary format (16 bits ID, 16 bits Data)
Closed 1 Open 0 ALERT ASCII format (4 chars ID, 4 chars Data)
Open 0 Closed 1 Reserved - Do not use
Closed 1 Closed 1 Diagnostic Mode if S1 & S2 are 1(see Diagnostic Mode DIP switch settings),
otherwise Reserved – Do not use.
ALERT Transmission Preamble Length (½ clear carrier, ½ mark tone)
Switch 5 Switch 6 Switch 7
Open 0 Open 0 Open 0 101 milliseconds
Closed 1 Open 0 Open 0 182
Open 0 Closed 1 Open 0 262
Closed 1 Closed 1 Open 0 343
Open 0 Open 0 Closed 1 424
Closed 1 Open 0 Closed 1 504
Open 0 Closed 1 Closed 1 585
Closed 1 Closed 1 Closed 1 665
ASYNC Input Voltage level Selection
(Note – this switch has no effect if SYNC serial is enable with Switch 1 & Switch 2)
Switch 8
Open 0 Logic Level input selected (0 V = 0, 3 to 5 V = 1)
Closed 1 RS232 (EIA) levels