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Chapter 5 - AsconMBCommLib
151
5-3-22 MB_SLV_RD_REAL
FB Prototype
MB_SLV_RD_REAL
Input parameters
Output parameters
Description
This Function Block reads a REAL value from the memory area corresponding to
the passed register (
REGISTER
). The module returns the
OPRS
parameter that is
used to detect if the operation is performed correctly, and the value of the register
(
DATA
). The setting
AD_MODE
allows the user to select if the
REGISTER
input
base is 0 (
AD_MODE = FALSE
) or 1 (
AD_MODE
= TRUE). The default value for
AD_MODE
is TRUE.
Reference
tables
Here are reported the range of the parameters used by the function block.
Protocol
OPRS
Label Type Description
PROTOCOL ASCON_SERIALPROTOCOL Reference Protocol
REGISTER UINT Register
AD_MODE BOOL
Addressing Mode Setting
(default value = TRUE)
Label Type Description
OPRS BOOL Function block result
DATA REAL Data
PROTOCOL
REGISTER
AD_MODE
ASCON_SERIALPROTOCOL
UINT
BOOL
¡
¡
¡
USINT
BOOL
OPR
S
DATA
¡
¡
Protocol Description
SLAVE1 Protocol Modbus Slave 1
SLAVE2 Protocol Modbus Slave 2
OPRS Description
0 Service executed correctly
1 Address not allowed
3 Protocol number not valid
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