IDEC FT1A Series User Manual page 286

11: M C
ODBUS OMMUNICATION
Configure the requests of the Modbus TCP Client.
4.
A maximum of 255 requests can be entered in one request table. Specify the Modbus TCP servers with the remote host numbers.
After all requests are configured, click OK button to close the dialog box.
Choose to use Request Execution Devices and Error Status data registers if necessary. When using Request Execution Devices and
Error Status data registers, enter the first number of the devices.
5. Download the user program to the SmartAXIS.
Programming for the Modbus TCP client is complete. Details about parameters and valid values are as follows.
Function Code
The Modbus TCP of the SmartAXIS supports eight function codes as listed in the table below. Supported function codes and valid
slave addresses vary with each Modbus server device to communicate with. Configure the function codes according to the
specifications of the Modbus server devices.
Function Code
01 Read Coil Status
02 Read Input Status
03 Read Holding Registers
04 Read Input Registers
05 Force Single Coil
06 Preset Single Register
15 Force Multiple Coils
16 Preset Multiple
Registers
11-22
Data Size Slave Address
1 to 128 bits 000001 - 065535
1 to 128 bits 100001 - 165535
1 to 64 words 400001 - 465535
1 to 64 words 300001 - 365535
1 bit 000001 - 065535
1 word 400001 - 465535
1 to 128 bits 000001 - 065535
1 to 64 words 400001 - 465535
S AXIS P
MART RO
Reads bit device statuses of Q (output), R (shift register), or
M (internal relay).
Reads bit device statuses of I (input), T (timer contact), or C
(counter contact).
Reads word device data of D (data register), T (timer preset
value), or C (counter preset value).
Reads word device data of T (timer current value) or C
(counter current value).
Changes a bit device status of Q (output), R (shift register),
or M (internal relay).
Changes word device data of D (data register).
Changes multiple bit device statuses of Q (output), R (shift
register), or M (internal relay).
Changes multiple word device data of D (data register).
/L U ' M FT9Y-B1378
ITE SER S ANUAL
SmartAXIS as Modbus Slave