Mace HydroMace XCi, Product Manual, Page: 91 / 270

MODBUS mode
The MODBUS implementation complies with the
MODBUS over Serial Line Specification V1.0
and
MODBUS Application Protocol Specification V1.1
.
The external port is either a standard “ RS232 ” port or a two-wire “ RS485 ” port, depending on the selected
MODBUS mode. The MODBUS parameters are configurable by entering the appropriate “ Address ”,
selecting the correct “ Baudrate ” from the drop down list and checking the required radio buttons
WARNING: The user must ensure that there are no two devices with the same
address on the same bus. In such a case, the behaviour of the bus is unpredictable.
Supported function codes:
Command: Code (hex): Sub-code (dec):
Read input registers 04
Diagnostics 08 00-04, 10-18
Register map information:
l
Twenty (20) register pairs are available - 30001-30002 to 30039-30040
l
Register byte order is big-endian
MACE XCi User Manual - 91 -