Mitsubishi Electric MELSEC FX3U Programming Manual page 195

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
*1
3. Indexing
Devices used in OUT instruction can be indexed with index registers (V and Z).
(State relays (S), special auxiliary relays (M), 32-bit counters (C), and "D .b" cannot be indexed.)
Circuit program
X000
*1. This function is supported only in FX
4. Bit specification of data register (D)
A bit in data register (D) can be specified as a device used in OUT instruction.
Circuit program
X000
*1. This function is supported only in FX
Caution
• When a special internal relay (M), timer or counter is used, program steps increase as described in
"Setting range of timers and counters" on the previous page.
• Do not use the last bit number of a data register (D) or extension register (R) as the set value of a 32-bit
counter.
Errors
• When an I/O number used in OUT instruction does not exist due to indexing, M8316 (Non-existing I/O
specification error) turns ON.
• When the device number of a device (M, T or C) other than I/O used in OUT instruction does not exist due
to indexing, an operation error (error code: 6706) occurs.
List program
0000 LD
0001 OUT
Y000Z0
/FX
3U 3UC
*1
List program
0000 LD X000
0001 OUT D0.3
D0.3
/FX
3U 3UC
The index registers V0 to V7 and Z0 to Z7 are
available for indexing.
When a used device is an input (X) or output
(Y), the value of an index register (V or Z) is
X000
converted into an octal number, and then
Y000Z0
added.
Example:When the value of Z0 is "20", Y024
turns ON or OFF.
PLCs.
When specifying a bit in data register, input "."
after a data register (D) number, and then
input a bit number (0 to F) consecutively.
Only 16-bit data registers are available.
Specify a bit number as "0, 1, 2, ... 9, A, B, ...
F" from the least significant bit.
Example: In the example shown on the left,
the bit 3 of D0 turns ON or OFF
when X000 turns ON or OFF.
PLCs.
7 Basic Instruction
7.2 OUT
1
2
3
4
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7
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9
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