Description of FINS Commands
Section
6-3
182
command code
READ ITEM FROM MULTIPLE FUNCTION BLOCKS
02 42
Function
Reads the specified ITEM from multiple function blocks.
Command format
Command code
Data format
02 Hex
42 Hex
Number
of ITEMs
Parameter
type (block
address)
Read start
address
repeated
Data length
(bytes)
1
1
2
2
2
1) Number of ITEMs
Specify the number of ITEMs to read.
2) Parameter type
Specify function block addresses 0 to 999 within the range 0 to 03E7 Hex.
3) Read start address
Specify ITEM numbers 0 to 999 in the function block specified by
parameter type within the range 0 to 03E7 Hex.
Specifiable ITEMs are all ITEMs in all function blocks excluding the
sequence commands (ITEM011 onwards) in the Step Ladder Program
block (Block Model 301).
Note 1
Specify the parameter type and read start address for the number of ITEMs.
Response format
Command
code
Response
code
Data
format
02
Hex
42
Hex
MRES SRES
Number
of
normal
read
ITEMs
Parameter
type
Read
start
address
Data
length
(byte)
Read
data
repeated
Data
length
(bytes)
1
1
1
1
2
2
2
1
Note 2
When one or more ITEMs has been read correctly, this shall be regarded as
a normal completion. By a normal completion, the number of ITEMs that were
read correctly and the data of the number of ITEMs that were read correctly
(1 to number of ITEMs) are returned as the FINS response.
The length of the read data is expressed in bytes.