Guidance
37
STEP 2 Connection of termination resistor
Connect a termination resistor for a driver located the farthest away (positioned at the end) from the host controller.
There are the following two methods for how to connect a termination resistor.
z
When a termination resistor inside the driver is used
Change the "RS-485 communication termination resistor" parameter to "Enable" with the support software.
Name Setting
RS-485 communication termination resistor Enable
The termination resistor is turned ON only when the main power is supplied to the driver since it is turned ON or
OFF inside the driver.
The termination resistor inside the driver is set based on the address number (slave address).
The terminating resistor is enabled when the slave address 4 is set (initial value).
When the slave address 4 is used, check the connection of termination resistor.
Refer to the OPERATING MANUAL Function Edition for how to set the address number.
z
When a resistor (120 Ω) is connected between the TR+ and TR- terminals of the CN4 connector
Connecting method
1. Connect lead wires to a resistor.
2. Connect the lead wires between the TR+ and TR−
terminals of CN4.
•
Be sure to connect a resistor between the TR+ and TR− terminals. Incorrect connection may cause damage to
the resistor.
•
When connecting a resistor, set the "RS-485 communication termination resistor" parameter to "Disable."
For a resistor, use a metal lm resistor of 120 , 1/2 W or more.
STEP 3 Power activation
Turn on the main power supply.
Start the support software.
Execute "Communication port" to check the setting of the communication port.
Execute "Data reading" to read the driver data.
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