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Appendix E

Data Areas

The data areas in the C200H are summarized below. Prefixes are included with bit and word addresses when

inputting them is required to designate the area, i.e., bits/words input without a prefix are considered to be IR

or SR bits/words.

Area Bits Words Notes

IR 00000 to 23515 000 to 235 Words 000 through 029 are allocated to I/O Units on the

CPU and Expansion I/O Racks as needed. Words 050

through 231 are allocated to Special I/O Units and Units on

Remote I/O Racks as needed. Any of these words and the

remainder of the IR area is available for used as work bits.

SR 23600 to 25507 236 to 255 Bits 25200 to 25507 are dedicated for specific purposes.

and can not be used for other purposes. Bits 23600 to

25115 are available when not used for their assigned pur-

poses. In designating operands, the SR area is considered

as a continuation of the IR area. See tables of dedicated

bits following this table.

HR HR 0000 to

HR 9915

HR 00 to HR 99 HR bits are available for general data storage and manipu-

lation. The HR area maintains bit status when PC power is

turned off.

AR AR 0000 to

AR 2715

AR 00 to AR 27 AR bits are mostly dedicated for specific purposes. Un-

used AR bits may be used as works bits. See tables of

dedicated bits following this table.

LR LR 0000 to LR 6315 LR 00 to LR 63 LR bits are used for data exchange in PC Link Systems.

When the PC does not include a PC Link System, LR bits

may be used for SYSMAC LINK or SYSMAC NET Link

Systems. LR bits may be used as work bits when not used

for data links.

DM Not accessible as

bits.

Read/write:

DM 0000 to DM 0999

Read only:

DM 1000 to DM 1999

DM 0000 through DM 0999 are generally used for data

storage. DM 0969 through DM 0999 are used in the Error

History function with the CPU11-E. DM 1000 through

DM 1999 are used for Special I/O Units.

TC (TC 000 to TC 511) (TC 000 to TC 511) The TC area consists of TC numbers used to manipulate

and access timers and counters. When used as a bit oper-

and, a TC number accesses the Completion Flag for the

timer or counter defined using the TC number. When used

as a word operand, the TC number accesses the present

value of the timer or counter.

TR (TR 0 to TR 7) Not accessible as words. TR bits can only be used in the LOAD and OUTPUT in-

structions to store and retrieve execution conditions. Stor-

ing and retrieving execution conditions is necessary when

programming certain types of branching ladder diagrams.

1 2 ... 327 328 329 330 331 332 333 334 335 336 337 ... 367 368

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