820
15 EXTERNAL DEVICE COMMUNICATION INSTRUCTION
15.1 Serial Communication 2
15
EXTERNAL DEVICE COMMUNICATION
INSTRUCTION
15.1
Serial Communication 2
RS2
This instruction sends or receives data by non-protocol communication via serial ports of RS-232C or RS-485.
Setting data
■
Descriptions, ranges, and data types
■
Applicable devices
*1 T, ST, C cannot be used.
Processing details
This instruction sends or receives data by non-protocol communication via the built-in RS-485 port or the optional RS-232C or
RS-485 serial ports installed in the CPU module. This instruction specifies the head device storing the sent data from the CPU
module, the number of data bytes, the head device storing the received data, and the maximum number of bytes that can be
received. For details, refer to
MELSEC iQ-F FX5 User's Manual (Serial Communication).
Ladder diagram
Structured text
ENO:=RS2(EN,s,n1,n2,n3,d);
FBD/LD
Operand
Description
Range
Data type
Data type (label)
(s)
Head device storing send data
16-bit signed binary/
character string
ANY16
(n1)
Number of bytes of data to be sent
0 to 4096
16-bit unsigned binary
ANY16_U
(d)
Head device storing receive data
16-bit signed binary/
character string
ANY16
(n2)
Number of bytes to be received
0 to 4096
16-bit unsigned binary
ANY16_U
(n3)
Communication channel
K1 to 4
16-bit unsigned binary
ANY16_U
EN
Execution condition
Bit
BOOL
ENO
Execution result
Bit
BOOL
Operand
Bit
Word
Double word Indirect
specification
Constant
Others
X, Y, M, L, SM,
F, B, SB, S
T, ST, C, D, W,
SD, SW, R
U
\G
Z
LC
LZ
K, H
E
$
(s)
(n1)
(d)
(n2)
(n3)
(s)
(n1)
(d)
(n2) (n3)
EN
ENO
s
n1
d
n2
n3
Summary of Contents for MELSEC iQ-F FX5
Page 1: ...MELSEC iQ F FX5 Programming Manual Instructions Standard Functions Function Blocks ...
Page 2: ......
Page 17: ...15 CONTENTS ...
Page 24: ...22 MEMO ...
Page 1050: ...1048 26 TIME DATA FUNCTIONS 26 4 Division MEMO ...
Page 1068: ...1066 29 COUNTER FUNCTION BLOCKS 29 4 Counter Function Block Operation error There is no error ...
Page 1107: ...I 1105 MEMO ...
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