Fnc 44 - Bon / Check Specified Bit Status - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
12.5 FNC 44 – BON / Check Specified Bit Status
Outline
This instruction checks whether a specified bit position in a specified device is ON or OFF.
1. Instruction format
FNC 44
D BON
2. Set data
Operand type
S S
1
D
n
3. Applicable devices
Bit Devices
Oper-
and System User
Type
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
S S
1
S
D
2
n
1: "D .b" is available only in FX
2: This function is supported only in FX
Explanation of function and operation
1. 16-bit operation (BON and BONP)
The status (ON or OFF) of the bit "n" in
[When the bit "n" is ON,
• When a constant (K) is specified as the transfer source
format.
Command
input
b15 b14 b13
1 0
K15 K14 K13
342
Mnemonic
16-bit Instruction
P
7 steps BON
BONP
Word device number storing the source data
Bit device number to be driven
Bit position to be checked
[n: 0 to 15 (16-bit instruction), 0 to 31 (32-bit instruction)]
Digit Specification
1
and FX
3U
D D is set to ON. When the bit "n" is OFF,
1
FNC 44
S D
BON
S
b12 b11 b10 b9 b8
1 0 0 0 0 1
K12 K11 K10 K9 K8 K7
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Description
Word Devices
Special
System User
Unit
PLCs. However, index modifiers (V and Z) are not available.
3UC
/FX PLCs.
3U 3UC
D S is output to D D .
1 1
, it is automatically converted into the binary
D S
1
n S
(n = K0 to K15)
b7 b6 b5 b4 b3 b2
0 1 0 0 1 1
K6 K5 K4 K3 K2
12 Data Operation – FNC 40 to FNC 49
12.5 FNC 44 – BON / Check Specified Bit Status
Mnemonic
32-bit Instruction
DBON
13 steps
DBONP
Con- Real
Index
stant Number
V Z Modify K H
2
D D is set to OFF.]
1
D
= ON/OFF status of bit "n"
b1 b0
1 1
← n
K1 K0
D bit device
n = 5
0 (OFF)
n = 8
1 (ON)
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Data type
16- or 32-bit binary
16- or 32-bit binary
16- or 32-bit binary
Others
Charac-
Pointer
ter String
E " " P