IAI America PSEL - Manual (Page 267)

257
Part 2 Programs
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))
3. Points to Note
 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.)
 If an extension condition is not specified for steps in which an input condition is specified, the steps will
be treated as LD (LOAD).
 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
 The following circuit cannot be expressed. Create an equivalent circuit.
Cannot be expressed.
1 2
3
OUTR301
OUTR302