Omron PLC CS1D-H CPU Unit CS1D-CPU68HA

Programming

•SFC (sequential function charts)

•ST (structured text)

• Mnemonics

Number of tasks

Note 1:Cyclic tasks are executed each cycle and are controlled with TKON(820) and TKOF(821) instructions.

2:The following 4 types of interrupt tasks are supported. Power OFF interrupt tasks: 1 max. Scheduled interrupt tasks: 2 max. I/O in- terrupt tasks: 32 max. External interrupt tasks: 256 max.

Interrupt types

Power OFF Interrupts: Interrupts executed when the CPU Unit’s power is turned OFF.

External I/O Interrupts: Interrupts from the Special I/O Units, CS-series CPU Bus Units, or the Inner Board.

I/O Area

The setting of the first word can be changed from the default (CIO 0000) so that CIO 0000 to CIO 0999 can be used. I/O bits are allocated to Basic I/O Units, such as CS-series Basic I/O Units, C200H Basic I/O Units, and C200H Group-2 High-density I/O Units.

Link bits are used for data links and are allocated to Units in Controller Link Systems and PLC Link Systems.

CS-series CPU Bus Unit bits store the operating status of CS-series CPU Bus Units. (25 words per Unit, 16 Units max.)

Special I/O Unit Area

Special I/O Unit bits are allocated to CS-series Special I/O Units and C200H Special I/O Units. (See Note.)

(10 words per Unit, 96 Units max. The maximum total number of slots, however, is limited to 80 including expansion slots, so the maximum number of Units is actually 80.

Note: A maximum of 16 C200H Special I/O Units can be mounted. Also, depending on the Units, the maximum may be 10.

Some I/O Units are classified as Special I/O Units.

Inner Board bits are allocated to Inner Boards. (100 I/O words max.)

SYSMAC BUS bits are allocated to Slave Racks connected to SYSMAC BUS Remote I/O Master Units. (10 words per Rack, 5 Racks max.)

I/O Terminal bits are allocated to I/O Terminal Units (but not to Slave Racks) connected to SYSMAC BUS Remote I/O Master Units. (1 word per Terminal, 32 Terminals max.)

C200H Special I/O Unit bits are allocated to C200H Special I/O Units, and accessed separately from I/O refreshing.

Inputs: CIO 035000 to CIO 039915 (words CIO 0350 to CIO 0399)

DeviceNet bits are allocated to Slaves according to DeviceNet remote I/O communications.

When a PLC Link Unit is used in a PLC Link, use these bits to monitor PLC Link errors and the operating status of other CPU Units in the PLC Link.

37,504 (2,344 words): CIO 380000 to CIO 614315 (words CIO 3800 to CIO 6143)

These bits in the CIO Area are used as work bits in programming to control program execution. (They cannot be used for external I/O.)

These bits in the CIO Area are used as work bits in programming to control program execution. (They cannot be used for external I/O.)

When using work bits in programming, use the bits in the Work Area first before using bits from other areas.

Holding Area

Holding bits are used to control the execution of the program, and maintain their ON/OFF status when the PLC is turned OFF or the operating mode is changed.

Note: The Function Block Holding Area words are allocated from H512 to H1535. These words can be used only for the function block instance area (internally allocated variable area).

Temporary bits are used to temporarily store the ON/OFF execution conditions at program branches.

Note: The time units for timer settings are 0.1 s, 0.01 s, and 0.001 s (depending on the timer instruction that is used).

DM Area

Internal Special I/O Unit DM Area: D20000 to D29599 (100 words x 96 Units)

Used to set parameters for Special I/O Units. CPU Bus Unit DM Area: D30000 to D31599 (100 words x 16 Units)

Used to set parameters for CPU Bus Units.

Inner Board DM Area: D32000 to D32099

Used to set parameters for Inner Boards.

Used as a general-purpose data area for reading and writing data in word units (16 bits). Words in the DM Area maintain their status when the PLC is turned OFF or the operating mode is changed.