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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
14 Handy Instruction – FNC 60 to FNC 69
14.4 FNC 63 – INCD / Incremental Drum Sequencer
14.4 FNC 63 – INCD / Incremental Drum Sequencer
Outline
This instruction creates many output patterns using a pair of counters.
1. Instruction format
2. Set data
3. Applicable devices
S1: "D.b" is available only in FX3U and FX3UC PLCs. However, index modifiers (V and Z) are not available.
S2: This function is supported only in FX
3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (INCD)
The current value of a counter is compared with the data table having "n" lines starting from (which
occupies "n" lines x 1 device). When is equivalent to the table data, the current output is reset, and the next
output is set to ON. In this way, the ON/OFF status of specified outputs is controlled in turn.
Operand type Description Data type
Head word device number storing the set value 16-bit binary
Head number of counters whose current value is monitored 16-bit binary
Head bit device number to be output Bit
n Number of output bit devices [1 ≤ n ≤ 64] 16-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD
.b KnX KnY KnM KnS T C D R
U\G
V Z Modify K H E "
"P
33333333S2 3
33
33 3 S1 3
n 33
FNC 63
INCD
−
Mnemonic Operation Condition
16-bit Instruction
9 steps INCD
Mnemonic Operation Condition
Continuous
Operation
32-bit Instruction
S
1
S
1
S
2
D
S
1
S
1
S
2
S
2
D
D
1
S
2
D
1
S
1
D
1
S
2
Command
input
FNC 63
INCD
nS
1
S
2
D
K9999
Count signal
S
2