Setting The Modbus Master - Toho Electronics TRM20A Operation Manual

8.14 Setting the Modbus master

[Description]
With this device as the Modbus master, carry out the settings of the device to be connected with the
general-purpose Modbus slave. This is used when the communication type in section 8.12 is Master
(General). For details about the Modbus master specifications, see the COMMUNICATION
FUNCTION OPERATION MANUAL.
Note) No settings can be changed during the recording process.
[Operation]
On the system setting screen, select Comm. key
setting screen.
① Selection of communication ID
The Modbus master can acquire the data for up to 12 types of slaves. Select the ID for
connection.
② Setting of slave ID
Set the slave ID for ModbusRTU. (0 to 247)
"0" refers to "Not connected". If the ID is 0, data acquisition is not carried out.
③ Setting of relative address
Set the communication address of a slave device. (0 to 9999)
Acquire data from slave devices in combination of ⑤ "Modbus register type" and an address.
ModbusMas. key to open the Modbus master
⇒
8-17
① Selection of communication ID
② Setting of slave ID
③ Setting of relative address
④ Selection of data format
⑤ Selection of Modbus register
type
⑥Selection of decimal point
position
⑦Setting of the number of
data to be acquired