Serial
Serial parameters to be set selecting the interfaces node “COM_1”. They are common for both operating modes client and server.
The parameter “Data bits” always has to be set to “8” for Modbus.
Modbus RTU server
Server specific parameters to be set selecting the protocol’s node “Modbus_RTU_Server”.
“Address”
Bus address of the PLC as Modbus RTU Server on that interface
“Byte Order ”
Format/Endianess for the transmission of WORD values (register) within the request/response telegram (default: Big Endian)
“Disable”
|
Parameter |
Default |
Value |
Description |
|---|---|---|---|
|
Disable write to %MB from |
0 |
0 ... 65535 |
Disable write access starting at %MBx |
|
Disable write to %MB to |
0 |
0 ... 65535 |
Disable write access up to %MBx |
|
Disable read from %MB from |
0 |
0 ... 65535 |
Disable read access starting at %MBx |
|
Disable read from %MBx to |
0 |
0 ... 65535 |
Disable read access up at %MBx |
It is possible to disable read and/or write access to individual segments. Reading/writing is disabled beginning at the set start address and is valid up to the set end address (inclusive).
Modbus RTU client
“Modbus RTU Client” does not have any protocol parameters.