RC Systems 10-0517, Руководство по эксплуатации

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UM-1096
Revision A 24
Appendix 3 Modbus Table and Operations
The SensePoint may be equipped with two optional (10-0388 Relay/RS-485 Modbus Option Board) RS-
485 boards where the 10-0388 Relay board can be set up as master (for remote sensors) or slave, and
the RS-485 Modbus Option board can be set up as master (for remote sensors) and slave (base 1).
The Modbus slave ports allow function code 3 (write coil), as well as function code 6, and 16 (write
holding registers). These function codes can be used to write configuration parameters to the
SensePoints. Writing parameters that span multiple register (such as 32bit floating points) requires
function code 16. All registers must be written at once.
The following table describes the SensePoint Modbus slave database. Any portion of this data may be
read by a Modbus master device such as a PC, PLC, DCS or RC Systems ViewSmart controllers. Since the
Modbus port is RS-485, multiple SensePoints may be multi-dropped onto the same cable.