Modbus Interface For Rs-485 - AND Check Weighing Indicator AD-4404 Instruction Manual

9.3. Modbus Interface for RS 9.3. Modbus Interface for RS- - - - 485
9.3. 9.3. Modbus Interface for RS Modbus Interface for RS
Modbus is a kind of connection that is used with the RS-485 serial interface.
It is not necessary to make a program for communication between these units.
The communication uses the following memories of the monitor unit or computer.
Data is specified with reference No. and address No.
Refer to the instruction for Modbus of the monitor unit or computer.
The connection for Modbus is as follows.
OK
30.000kg
4.500kg
2.250kg
1.320kg
2.700kg
Monitor unit or computer
Monitor example: Monitouch V6 (checked at 2002)
Set the following parameters of RS-485 interface. Refer to " 11. Function List"
Function and parameter
r5 f-1
r5 f-2
6
r5 f-3
r5 f-4
r5 f-5
r5 f-6
r5 f-7
r5 f-8
Reference No.
Type
Coil
Input status
Input register
Holding register
1000
kg
Output data
Communication mode
MODBUS
Baud rate
Parity check
Character length
Stop bits
Terminator
Address
Reference No. Description
0
1
3
4
485
485 485
Connection of RS-485 interface
2000
kg
Connection is 31 units in maximum
Description
Select either parameter.
Set MODBUS
Select either parameter.
Set unique address number
The same as input bits of control I/O
The same as output bits of control I/O
Register to read data
Register to read and write data
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600 400
kg kg