Appendix, 4 number format, 5 glossary – KROHNE UFC 400 Modbus EN User Manual
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APPENDIX
8
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UFC 400
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05/2013 - 4002744801 - AD Modbus UFC 400 R01 en
8.4 Number format
• Hexadecimal values are written in the format 0xNNNN, where NNNN is the hexadecimal
value.
• Decimal values are written in the format 0dNNNN or NNNN, where NNNN is the decimal
value.
8.5 Glossary
RTU
Remote Terminal Unit mode is a Modbus serial transmission mode
RS232
TIA/EIA-232 Standard
RS485
TIA/EIA-485 Standard
Master/Client
A device that polls one or more slave devices and always initiates
communication
Slave/Server
A device that responds to requests from a master and never initiates
communication
CRC
Cyclic Redundancy Checksum
Register
A Modbus data object corresponding to a word (16 bits)
Coil
A Modbus data object corresponding to a single bit
LSB
Least Significant Byte
MSB
Most Significant Byte
lsb
least significant bit
msb
most significant bit