Chapter 8 Hardware Configuration
and IP under the Ethernet tab.
Local Address The device address range used by the master in the data exchange table
<< / >>
「
<<
」
: Input: the data block where the master reads from a slave
「
>>
」
: Output: the data block where the master writes to a slave
Remote Address
This is the device address range used by a slave in the data exchange table.
The device range is in hexadecimal
if the slave in the data exchange table is a
user-defined Modbus Device.
Quantity
This is the size of the data exchange table, which is consistent with the result calculated
from the device range.
8.3.1.1 Data Exchange - COM1 and Data Exchange - COM2
On the Data Exchange-COM1 or Data Exchange-COM2 tab, double-click row in the data exchange table to set to
open the Item dialog box as shown below. Select the Enable check box to enable the data exchange table in the
mode mentioned above. Remote Address is the address of the target slave for data exchange. The Shortest Update
Cycle is the period for data exchange of the data exchange table. The connection times out if the target device does
not make any response within the time specified by Connection Timeout.
Select Support Read/write synchronization (Function code 0x17) to have the master complete reading and writing
in a single command to improve the efficiency of data exchange. This uses the specific Modbus function code. Make
sure that all devices in data exchange support the Modbus function code for read and write synchronization. Otherwise,
the attempt to read and write fails due to the failure to identify function codes after receiving the command from the
master device.
Remote Device Type is the model of a target slave including the Delta PLC and standard Modbus devices.
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