IDEC MicroSmart - Manual (Page 186)

7: B ASIC I NSTRUCTIONS
7-2 « FC4A M ICRO S MART U SER ’ S M ANUAL »
LOD (Load) and LODN (Load Not)
The LOD instruction starts the logical operation with a NO (normally open) contact. The LODN instruction starts the log-
ical operation with a NC (normally closed) contact.
A total of eight LOD and/or LODN instructions can be programmed consecutively.
OUT (Output) and OUTN (Output Not)
The OUT instruction outputs the result of bit logical operation to the specified operand. The OUTN instruction outputs the
inverted result of bit logical operation to the specified operand.
Multiple OUT and OUTN
There is no limit to the number of OUT and OUTN instructions that can be programmed
into one rung.
Programming multiple outputs of the same output number is not recommended. How-
ever, when doing so, it is good practice to separate the outputs with the JMP/JEND set of
instructions, or the MCS/MCR set of instructions. These instructions are detailed later in
this chapter.
When the same output number is programmed more than once within one scan, the out-
put nearest to the END instruction is given priority for outputting. In the example on the
right, output Q0 is off.
Ladder Diagram Valid Operands
The valid operand range depends on the CPU module type. For details, see pages 6-1 and 6-2.
Instruction I Q M T C R
LOD
LODN
0-307 0-307
0-1277
8000-8157
0-99 0-99 0-127
Ladder Diagram Valid Operands
The valid operand range depends on the CPU module type. For details, see pages 6-1 and 6-2.
Instruction I Q M T C R
OUT
OUTN
— 0-307
0-1277
8000-8077
— — —
Caution
• For restrictions on ladder programming of OUT and OUTN instructions, see page 29-22.
Ladder Diagram
I1 I2 Q0
Q1
Q2
Ladder Diagram
I1
I2
I3
END
ON
OFF
OFF
Q0
Q0
OFF