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Table 2.2: Send Only and Clear Buffer Control Characters
Ports to Transmit or
Clear Receive Buffer
None
A Only
B Only
A & B
C Only
A & C
B & C
A, B, & C
D Only
A & D
B & D
A, B, & D
C & D
A, C, & D
B, C, & D
A, B, C, & D
Note: The 232BSS4 ignores the upper 4 bits of the control byte. If the
Master device is incapable of sending characters outside the printable
ASCII range, decimal 64 can be added to each of the control bytes and the
switch will operate properly.
Ignore Commands – "T" + one control byte specifying the length of time to
ignore commands.
The Ignore Commands command tells the 232BSS4 to ignore all
commands from the Master device for a specific amount of time. This
command is useful if the data coming from the Master device may
contain switching commands. By switching to a port, then sending the
Ignore Commands command, all data received on the Master port of the
232BSS4 will be passed directly to the selected Slave port without
checking for a command sequence until the programmed time has
elapsed. The control byte at the end of the command tells the 232BSS4
how long to ignore commands from the Master device. This byte is
ASCII "0" – "9" (48 – 57 Decimal). Timer values for each Control byte
are given in Table 2.3.
Documentation Number 232BSS4-2907m
&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
Binary Value
Decimal
(x = Don't Care)
Value
xxxx0000
0 or 64
xxxx0001
1 or 65
xxxx0010
2 or 66
xxxx0011
3 or 67
xxxx0100
4 or 68
xxxx0101
5 or 69
xxxx0110
6 or 70
xxxx0111
7 or 71
xxxx1000
8 or 72
xxxx1001
9 or 73
xxxx1010
10 or 74
xxxx1011
11 or 75
xxxx1100
12 or 76
xxxx1101
13 or 77
xxxx1110
14 or 78
xxxx1111
15 or 79
ASCII
Character
"@"
"A"
"B"
"C"
"D"
"E"
"F"
"G"
"H"
"I"
"J"
"K"
"L"
"M"
"N"
"O"
11
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