Technical data Modbus
Bus system Modbus, RTU according to IDA specification
Transmission rate
The transmission Baud rate is automatically detected
Transmission mode Even parity: 8 data bits, 1 stop bit
Odd parity: 8 data bits, 1 stop bit
No parity: 8 data bits, 2 stop bits
The transmission mode is automatically detected
Bus length (max.) 1200 m (without repeater)
Response time: Write: up to 60 ms
Read: up to 60 ms
■
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
English
Finder SpA
Via Drubiaglio, 14 − 10040 Almese (TO) − Italy
T +39 011 9346 211 I F +39 011 9359 079
export@findernet.com I www.finder.de
To Next Page
Loading...