FC6A S
ERIES
M
ICRO
S
MART
A
LL
-
IN
-O
NE
T
YPE
C
OMMUNICATION
M
ANUAL
FC9Y-B1730
6-5
6: M
ODBUS
C
OMMUNICATION
4.
Click the
Communication Settings
button. The
Communication Settings
dialog box appears. Change settings, if
required.
5.
Click the
OK
button to return to the Modbus RTU Master Request Table. Designate requests under the
Function Code
. A
maximum of 255 requests can be entered in one request table.
Choose to use
Req. Execution Device
and
Error Status
data registers if necessary. When using
Req. Execution Device
and
Error Status
data registers, enter the first number of the devices.
Notes for Editing the Request Table
Request execution devices and error status data registers are allocated in the order of request numbers. When deleting a request or changing the
order of requests, the relationship of the request to the request execution devices and error status data register is changed. If the internal relay
or data register is used in the user program, the device addresses must be changed accordingly. After completing the changes, download the user
program again.
6.
When editing of the Master Request Table is complete, click the
OK
button to save changes.
7.
Download the user program to the FC6A Series MicroSmart.
Now, programming for the Modbus master is complete. Details about parameters and valid values are as follows.
Baud Rate (bps)
9600, 19200, 38400, 57600, 115200
Parity
Even, Odd, None
Stop Bits
1 or 2
Retry Cycle
1 to 10
Receive Timeout
1 to 255 (
×
10 ms)
Transmission Wait Time
0 to 5000 (ms)