UMB03
Read more than one hold registers
EN ： enable or not enable
TBL:Configuration table,If the input is MB200: MB200 is the configuration word （ Instruction Output ） M200.0 Communications have been queued （ Instruction Output ） M200.1 Communication completion （ Instruction Output ） M200.2 Communication error （ Instruction Output ） MB201 is error number.0 indicates no error.
SLA ： MODBUS slave address
ADDR ： The offset of hold register （ The offset of 4X ）
CNT ： Number of hold register
LDAT ： Store the data which was written from slave station
UMB04
Read the input register
EN ： enable or not enable
TBL:Configuration table,If the input is MB200: MB200 is the configuration word （ Instruction Output ） M200.0 Communications have been queued （ Instruction Output ） M200.1 Communication completion （ Instruction Output ） M200.2 Communication error （ Instruction Output ） MB201 is error number.0 indicates no error.
SLA: MODBUS slave address
ADDR:The offset of input register. （ The offset of 3x ）
CNT ： Number of input registers.
LDAT: Store the data which was written from slave station
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