Allen-Bradley SLC 500

QUICKDESIGNER Allen-Bradley •
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• 47
Set the Data Highway address of this module on switches SW2, SW3 and SW4. SW2 is the most
significant octal digit and SW4 is the least significant octal digit. Valid addresses are from 010 through
077 octal and 110 through 376 octal.
SWITCH POS STATE COMMENTS
SW5
SW5
1
2
Closed (on)
Closed (on)
Data Highway Baud Rate. Both
switches set to ON = 57.6 kbps.
SW6
SW6
SW6
1
2
3
Closed (on)
Closed (on)
Closed (on)
Computer port baud rate.
All three set to ON = 19200 Baud.
SW6 4 Open (off) Parity = None (Recommended)
In the above example, the Data Highway module is configured for 19200 Baud, no parity. These
settings are not mandatory, but recommended. Be sure to set the target display port for RS232, 19200
Baud, no parity, 8 data bits, 1 stop bit, handshaking (XON/XOFF) disabled.
A-B PLC-5 Tag Variables
The format for legal tag variables for the PLC-5 is:
Xf:e.s/_d
X = File Type
B = Bit C = Counter F = Floating Point I = Input
(not SLC 5/04)
N = Integer R = Control S = Status O = Output
(not SLC 5/04)
T = Timer A = ASCII* D = BCD*
* for display only
f = File Type Number
* The first 8 file numbers have a fixed File Type
0 = output 1 = input 2 = status 3 = bit 4 = timer
5 = counter 6 = control 7 = integer 8 = floating point
8 to 999 = file storage of any File Type
: = Colon delimiter separates file type and element numbers.
e = Elements number (see Note 2)
0 - 317 Octal for I/O files
0 - 999 Decimal for all other file types
. s= Period delimiter and Subelement mnemonic is used only with Timer, Counter or Control file
types. For example, T4:12.PRE. The "PRE" portion of the variable is the subelement mnemonic.
(Mnemonic is pronounced "nemonic.")
Word Addresses:
Timers and Counters = .PRE (preset) and .ACC (accumulated)
Registers = .LEN (length) and .POS (position)
/ b = Slash delimiter and Bit number
0 - 15 Decimal for I/O file types (Add a leading 'o' to the bit addres to designate octal address. EX:
I1:2/o17 is the same as I1:2/15).
0 - 15 Decimal for all other file types
optional 0 - 15,999 Decimal for bit type files when not specifying the element number.
Bit Addresses: