Specifications

Chapter 5 - AsconMBCommLib
149
5-3-20 MB_SLV_RD_DIGITAL
FB Prototype MB_SLV_RD_DIGITAL
Input parameters
Output parameters
Description This Function Block reads a digital 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 BOOL Data
PROTOCOL
REGISTER
AD_MODE
ASCON_SERIALPROTOCOL
UINT
BOOL
¡
¡
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USINT
BOOL
OPR
S
DATA
¡
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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