Fnc176 - Rd3A / Read Form Dedicated Analog Block - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
22.3 FNC176 – RD3A / Read form Dedicated Analog Block
Outline
This instruction reads an analog input value from the analog block FX
1. Instruction format
FNC 176
P
RD3A
2. Set data
Operand Type
m1
m2
D
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
m1
m2
D
Explanation of function and operation
1. 16-bit operation (RD3A)
Command
input
FNC176
RD3A
: Special block number
m1
FX /FX
3G
FX
3UC
: Analog input channel number
m2
FX -3A
0N
FX -2AD : K21 (ch 1) or K22 (ch 2)
2N
: Read data
D
A value read from the analog block is stored.
FX -3A
0N
FX -2AD : 0 to 4095 (12 bits)
2N
*1. The FX -3A is available only for the FX
0N
Mnemonic
16-bit Instruction
RD3A
7 steps
RD3AP
Special block number
- FX /FX /FX (D, DSS) PLC: K0 to K7
3G 3U 3UC
- FX -32MT-LT(-2) : K1 to K7
3UC
Analog input channel number
Word device storing the read data
Digit Specification
m1 m2
D
/FX (D, DSS) PLC : K0 to K7
3U 3UC
-32MT-LT(-2) : K1 to K7 (K0 indicates the built-in CC-Link/LT master.)
*1
: K1 (ch 1) or K2 (ch 2)
*1
: 0 to 255 (8 bits)
22 External Device – FNC170 to FNC179
22.3 FNC176 – RD3A / Read form Dedicated Analog Block
-3A or FX
0N
Operation Condition
32-bit Instruction
Continuous
Operation
Pulse (Single)
Operation
Description
Word Devices
Special
System User Index
Unit
V Z Modify K H
and FX PLCs.
3U 3UC
-2AD.
2N
Mnemonic Operation Condition
−
Data Type
16-bit binary
16-bit binary
16-bit binary
Others
Con- Real Charac-
Pointer
stant Number ter String
E " " P
609
21
22
23
24
25
26
27
28
29
30