Delta AS Series Operation Manual page 395

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Data Exchange Setting Page
Under the Data Exchange Tab, you can set up data exchange for COM communication, Ethernet communication and
Function Card. Click Add and then Edit or double-click the data exchange table to open the editing page.
 Local Device Setting
Select the option Enable for data exchange to start. You can set the shortest update cycle and
connection timeout time in ms. If there is no response from the target device for a period of time that you have set
,that is considered as a timeout. If you select the option Support Read/Write Synchronization (Function Code:
0x17), the master PLC CPU can use Modbus function code to complete read and write synchronization at one
execution. However you need to make sure all the devices support Modbus function codes; otherwise, the slaves
devices may NOT recognize the function code and fail to complete read/write synchronization.
 Remote Device Setting
Slave Address: station number of the slave device for data exchange
IP Address: IP address of the slave device (only available for EtherNet)
Remote Device Type: slave device model type, such as Delta PLC or standard Modbus devices
 Read: When PLC CPU reads data from the remote device: PLC CPU defines a device range to store data including
the device type, starting address and quantity which are read from the remote device. Define the device type, starting
address and quantity in the remote device that will be read by PLC CPU.
Local Start Address: Device type and start address of devices where PLC CPU store data
Remote Start Address: Device type and start address of the remote device to be read
Quantity: Data length of input
 Write: PLC CPU writes data to a remote device; PLC CPU defines a device range for the remote device to read the
following data, the device type, starting address and quantity. Define the device type, starting address and quantity in
the remote device that will be written by the PLC CPU.
Local Start Address: Device type and start address of the source data of PLC CPU
Remote Start Address: Device type and start address of the remote device where data are to be written
Quantity: Data length of output
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