Cutler-Hammer D320 PLC, Руководство пользователя

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Chapter 5: CPU Operation and Memory
53
Absolute Address Designation
In LDR, DLDR, STO, DSTO instructions, the absolute address is used to perform indirect memory
operations using pointers. The absolute address is also used by the D320 program loader port protocol
for reading and writing memory areas.
Absolute Address Absolute Address Register
Address
Dec. Hex.
Register
Address
Dec. Hex.
R0000 0 0000 F0000 448 01C0
R0001 1 0001 F0001 449 01C1
R0002 2 0002 F0002 450 01C2
: : : : : :
R0126 126 007E F0014 462 01CE
External
I/O
R0127 127 007F
System
Flags
F0015 463 01CF
L0000 128 0080 W0000 512 0200
L0001 129 0081 W0001 513 0201
L0002 130 0082 W0002 514 0202
: : : : : :
L0062 190 00BE W2046 2558 09FE
Link Area
L0063 191 00BF
Data Area
W2047 2559 09FF
M0000 192 00C0 W2048 2560 0A00
M0001 192 00C1 W2049 2561 0A01
M0002 194 00C2 : : :
M0003 195 00C3
T/C Set
Value
W2303 2815 0AFF
: : : W2304 2816 0B00
M0126 318 013E W2305 2817 0B01
Internal
Contact
M0127 319 013F : : :
K0000 320 0140
T/C
Present
Value
W2559 3071 0BFF
K0001 321 0141 SR0 3072 0C00
K0002 322 0142 SR1 3073 0C01
K0000 323 0143 : : :
: : :
System
Registers
SR511 3583 0DFF
K0126 446 01BE
Internal
Keep
Contact
K0127 447 01BF
When accessing a bit absolute address using the program loader port communications protocol, the bit
address (0 to 15) is kept separate from the word address (as shown below).
1 word display
For example, the absolute bit address for K127.12 internal contact is $1BFC (hex).
(word absolute address = $01BF + bit number = $C = $1BFC)
Refer to the appendix for a detailed explanation of the communications protocol.
Word absolute address bit number
15 4 3 0