Protocols Kosmos (Ascii) And Kosmos (Iso 1745); Modbus Rtu Protocol - Ditel DN109/NB Manual Tecnico

TECHNICAL MANUAL
LARGE DISPLAYS DN109/NB - DN119/NB - DN189/NB - DN129/NB
CHAPTER 26
Fig. 109: Diagram of use of the MSG.OFFSET and MSG.CURSOR parameters.
48. When modifying any parameter, the button is enabled to send the new information to the
display.

Protocols KOSMOS (ASCII) and KOSMOS (ISO 1745)

The specific information of the KOSMOS protocols must be consulted in the RS outputs
manual for KOSMOS indicators.

MODBUS RTU Protocol

As can be seen, in the frames the addressing in the RTU is slightly different and a CRC
(Cyclic Redundancy Check) is added. The PDU remains unchanged between both protocols.
Regarding the use of Modbus functions and display registers, MODBUS RTU is identical
to the MODBUS/TCP Ethernet protocol.
See section 24.2
SERIAL COMMUNICATION
Fig. 110: Modbus/TCP and Modbus/RTU differences.
for any necessary information.
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