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2 ladder statement field, 3 points to note – IAI America TT-C3 User Manual

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INTELLIGENT ACTUATOR

Chapter 4 Commands

5.
Pseudo

Ladder

T

ask

5.2

Ladder Statement Field

[1] Extension conditions

LD

LOAD

A

AND

O

OR

AB

AND

BLOCK

OB

OR

BLOCK

All of the above extension conditions can be used in non-ladder tasks.

[2] Ladder commands

OUTR

Ladder output relay (Operand 1 = Output, flag number)

TIMR

Ladder timer relay (Operand 1 = Local flag number, Operand 2 =

Timer setting (sec))

5.3

Points to Note

x This system only processes software ladders using an interpreter. Therefore, the processing time is much

longer than that of a dedicated commercial sequencer.
(This system is not suitable for large-scale ladder processing.)

x If an extension condition is not specified for steps in which an input condition is specified, the steps will be

treated as LD (LOAD).

x Always specify a “normally ON” contact for those steps that must be processed without fail, such as CHPR,

TSLP and GOTO. (LD 7001)

Virtual input 7001: “Normally ON” contact

x The following circuit cannot be expressed. Create an equivalent circuit.

Cannot be expressed.

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