Data Transmission - SBC ALD1D5FD Instructions De Montage Et D'utilisation

Technical data Modbus
Bus system
Transmission rate
Transmission mode
Bus length (max.)
Response time:
■ The communication is ready 30 s after the power on
■ The use of energy meter in bus with intensive communication could reduce the performance of the bus
■ Refresh time for the data is 5 s. For this reason one energy meter should be not polled faster as 5 s
■ 247 devices could be connected to the Modbus. With more than 128 devices, a repeater should be used
■ The interface don't have a terminal resistor, this must be provided external
■ For a description of the used registers please look at the register page

Data transmission

■ Only «Read Holding Registers [03]/ Write Multiple Registers [16]» instructions are recognized.
■ Up to 20 Registers can be read at a time.
■ The device supports broadcast messages.
■ In accordance with the Modbus protocol, a register R is numbered as R - 1 when transmitted.
■ The device has a voltage monitoring system. In case of voltage loss, registers are stored in EEPROM (transmission rate, etc.)
Exception Responses
■ ILLEGAL FUNCTION [01]: The function code is not supported.
■ ILLEGAL DATA ADDRESS [02]: The address of some requested registers is out of range
or more than 20 registers have been requested.
■ ILLEGAL DATA VALUE [03]: The value in the data field is invalid for the referenced register.
Changing the Modbus address direct on device
■ In the menu, go for «U»
■ Push long ( ≥ 3 sec) ► «Adr»
■ Push short ► address +1, push long ► address +10
■ Once the desired address is selected wait, to validate, till the root menu to come back
Modbus, RTU according to IDA specification
4800-9600-19 200-38 400-57 600-115 200.
The transmission Baud rate is automatically detected
No parity: 8 data bits, 1 stop bit
1200 m (without repeater)
Write: up to 60 ms
Read: up to 60 ms
Saia-Burgess Controls AG
Route Jo-Siffert 4 I 1762 Givisiez I Switzerland
T +41 26 580 30 00 I F +41 26 580 34 99
www.sbc-support.com
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