GE Industrial Solutions WattStation Pedestal EVSE Charger MODBUS Register Mapping Guide User Manual
Page 8
WattStation
TM
EV Charger MODBUS Register Guide
8 GE Energy ©2012 GE Company All Rights Reserved
EVSE allows up to 5 MODBUS/TCP connections concurrently, which means that it allows 5
MODBUS/TCP clients devices to communicate with it at the same time assumed that each
MODBUS/TCP client device only open one connection.
The first client which connects to the MODBUS server will have command priority, meaning all of the
EVSE basic command functionality will be driven from this first client. Any additional client
connections will only have monitoring capabilities.
EVSE supports 5 MODBUS/TCP communication connections
Figure – 3.3
GE WattStation Connect™ (a.k.a. GE Back end) server commands will take precedence over any
commands issued over the MODBUS protocol. BES will also have the capability to Enable/Disable the
MODBUS feature completely.
MODBUS/TCP
Client
EVSE
(MODBUS/TCP
Server)
MODBUS/TCP
Client
MODBUS/TCP
Client
MODBUS/TCP
Client
MODBUS/TCP
Client
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