Specifications

sigmadue - IEC 61131-3 Function Block Library
126
5-3-1 MODBUS MASTER SYNCHRONIZER
FB Prototype MB_MST_SYNC
Input parameters
Output parameters
Description This function block perform a synchronization of the Modbus Master Inquires using
the dedicated function blocks MB_MST_RD_WORD, MB_MST_WR_WORD,
MB_MST_RD_COIL and MB_MST_WR_COIL.
Reference Table
Label Type Description Range
ENABLE BOOL Enable/Disable the Modbus master synchronization
NR_CMD USINT
Number of inquires to be managed [num] 1... 255
Label Type Description
NR_SEQ USINT Number of the active control
ENABLE
NR_CMD
BOOL
USINT
¡
¡
USINT NR_SEQ
¡
Input Options
NR_CMD From 1 to 255. Default value 1
Output Options
NR_SEQ From 1 to 255