LD220
8
8-NONE-1
Not to be used for Modbus communication
9
8-NONE-2
8
no
2
Not used for Modbus communication.
Not used for Modbus communication.
Not used for Modbus communication.
Not used for Modbus communication.
This parameter enables the Modbus protocol and allows to set the Modbus
address.
0
Not to be used for Modbus communication, Modbus
protocol is disabled.
1 … 247
Modbus protocol is enabled: the serial interface is
using the Modbus RTU protocol.
The set value is the Modbus address of the device.
8.2 Modbus Communication
The Modbus functions described hereafter are available.
8.2.1 Read Holding Registers and Write Multiple Registers
Using the functions “Read Holding Registers” and “Write Multiple Registers” it is
possible to access all registers of the device.
All variables (current data) and status registers are mapped into Modbus
Holding Registers.
However, as all registers of the device are 32 bit registers, but Modbus Holding
registers are only 16 bit registers, each register of the device requires two
Holding registers (for this reason the use of the Modbus function “Write Single
Register” is not possible).
MAN LD220 E 1.4.odt
8 - Modbus RTU Interface
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