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5.1
Modbus connection
The Wallbox is connected to an external control
system using a two-wire RS485 bus (half-duplex).
Bus parameters used:
•
Baud 19200 bit/sec,
•
8 data bits,
•
1 stop bit,
•
1 parity bit (even),
•
Least significant bit sent first (LSB first).
Only unicast mode is supported as the addressing
mode.
Broadcast mode is not supported.
5.2
Functions supported by the Modbus
protocol
The Wallboxes support exclusively the following
functions:
•
03 (0x03) Read Holding Register
•
04 (0x04) Read Input Register
•
06 (0x06) Write Holding Register
•
16 (0x10) Write Multiple Register
The byte sequence is High byte before Low byte
(Motorola format).
The CRC checksum sequence is Low byte before
High byte (Intel format).
6.
Checking load management
Put the load management system into operation
after properly installing and configuring it.
i
When checking the load management system,
ensure that no vehicle is connected to any Wallbox.
•
Establish the power supply for the Wallboxes in
local load management mode, beginning with
the leader Wallbox.
•
Establish the power supply for all devices in
external load management mode, beginning
with the external control electronics.
•
The front illumination of each Wallbox lights up
for 5 minutes and then goes out.
•
Load management is now ready for operation.
Diagnosis of communication errors in the load
management system via the front illumination.
The front illumination flashes in the event of a fault.
Six brief white flashes. Pause, three long blue flashes.
Pause.
This flashing sequence indicates a communication
error between the leader Wallbox or the external
control system and the corresponding follower
Wallbox. Check whether the bus installation was
performed correctly. Once the fault has been
remedied and a self-test has been performed, the
front illumination lights up white and the charging
process can be requested. Please contact the
Hotline if the fault persists.
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