GE Industrial Solutions WattStation Pedestal EVSE Charger MODBUS Register Mapping Guide - Manual (Page 14)

WattStation TM EV Charger MODBUS Register Guide
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3.5 MODBUS Operations
3.5.1 Read EVSE MODBUS Register Data Module Info
In this architecture design, the authorized master device can get the MODBUS Register Data Module
information which includes the ID, address offset, and length of the data module w/ Function Code 3.
3.5.2 Read EVSE MODBUS Register Data
The authorized master device can read any valid MODBUS registers using Function code 3 or 23 as
shown in section 3.3.
3.5.3
Control EVSE
In this architecture design, the authorized master device can issue MODBUS Control command to
control EVSE by writing an appropriate value to the corresponding command register using function
code 16 or 23.
The supported MODBUS Control commands are defined and mapped to MODBUS registers in section
4.2.
4 EVSE MODBUS Register Map
4.1 EVSE MODBUS Register Data Module Information Registers
EVSE Module Register Data Module Information Registers are designed to provide the information on
• Version of MODBUS Register Map.
• Number of MODBUS Data Register Modules in this version of MODBUS Register
Map.
• Data Module ID, Address Offset, and length of each module in the MODBUS
Register Map.
The
address offset for EVSE Module Register Data Module Information Registers
is defined as 00xx00000011 in this version of MODBUS Register Map.
MODBUS Data Model: Input registers (Read only)
The M
Moodduullee IID D for EVSE Module Register Data Module Information Registers is defined as 00xx00.
Address
(hex)
MODBUS
Register
(decimal)
Variable
Name
Data
Range
Description Properties
Offset 1 MODBUS
Register
Data Module
Information
Registers
Validity
0-1 Indicates whether the
values in the MODBUS
Data Module Information
Registers are valid or not.
0---Invalid
1---Valid
R
Offset+1 2 MODBUS >= Indicate the version of R