Description of FINS Commands
Section
6-3
178
6-3 Description of FINS Commands
This section describes the command and response formats for FINS
commands issued to the Loop Control Unit.
command code
READ MULTIPLE ITEMS FROM FUNCTION BLOCK
02 40
Function
Reads multiple ITEMs from a single function block.
Command format
Command code
Data format
02 Hex
40 Hex
Parameter
type (block
address)
Number of
ITEMs
Read start
address
repeated
Data length
(bytes)
1
1
2
2
2
1) Parameter type
Specify function block addresses 0 to 999 within the range 0 to 03E7 Hex.
2) Number of ITEMs
Specify the number of ITEMs to be read from the specified function block.
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 read start address for the number of ITEMs.
Response format
Command code
Response
code
Data
format
02 Hex 40 Hex MRES SRES
Number of
normal
read ITEMs
Read
start
address
Data
length
(byte)
Read
data
repeated
Data
length
(bytes)
1
1
1
1
2
2
1