Communications - Siemens SICHARGE D Operating Instructions Manual

Description
2.3 Communications
C1
C2
D1
D2
E
F/Invalid
2.3

Communications

Communications are implemented between SICHARGE and the ELMS using the Modbus TCP
communication protocol. The SICHARGE charger acts as the Modbus server, while the ELM acts
as the Modbus client and initiates queries to the charger. Follow the Operating Instructions to
connect the network cable correctly.
Supported Modbus functions
Modbus function codes supported by the charger are listed in the table below:
Table 2-2
Function
3
6
16
12
3 Connected and ready (no ventilation required)
4
5 Connected and ready (ventilation required)
6
7 Disconnected
8 Error: Got no valid pilot state
Supported Modbus functions
Description
Read holding registers
Write single register
Write mutiple register
External Load Management System
Operating Manual, 07/2022, A5E52045935-AA