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Immediate data i/o instructions, More – Rockwell Automation 1785-L20C_L40C, D17856.5.14 ControlNet PLC-5 Programmable Controllers User Manual User Manual

Page 90

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ControlNet Instruction Set

Appendix C

C-2

Immediate Data I/O Instructions

Instruction

Description

IDI

IMMEDIATE DATA INPUT
Data file offset

Length

232

10

Destination

N11:232

Immediate Data

Input

IDI

If the input conditions are true, an immediate data input is initiated that

updates the destination file from the private buffers before the next normal

inputĆimage update. The Data file offset (232) is where the data is stored.

The Length (10) identifies the number of words in the transferĊit can be an

immediate value ranging from 1 to 64 or a logical address that specifies the

number of words to be transferred. The Destination (N11:232) is the

destination of the words to be transferred. The Destination should be the

matching dataĆtable address in the DIF except when you use the instruction

to ensure dataĆblock integrity in the case of Selectable Timed Interrupts

(STIs). See page

4Ć7

.

IDO

IMMEDIATE DATA OUTPUT
Data file offset

Length

175

24

Source

N12:175

Immediate Data

Output

IDO

If the input conditions are true, an immediate data output is initiated that

updates the private memory output buffers from the source file before the

next normal outputĆimage update. The Data file offset (175) is the offset

into the buffer where the data is stored. The Length (24) identifies the

number of words in the transferĊit can be an immediate value ranging from

1 to 64 or a logical address that specifies the number of words to be

transferred. The Source (N12:175) is the source of the words to be

transferred. The Source should be the matching dataĆtable address in the

DOF except when you use the instruction to ensure dataĆblock integrity in

the case of Selectable Timed Interrupts (STIs). See page

4Ć7

.

For detailed information on the instruction set for programming PLC-5
processors, see the Enhanced and Ethernet PLC-5 Programmable
Controllers User Manual, publication 1785-6.5.12, and the PLC-5
Programming Software Instruction Set Reference, publication 6200-6.4.11.

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