Keyence N-400 User Manual download pdf (Page 34)

Chapter 2 Installation Procedure

2.5 Using Connection Test Mode

This section describes the procedure for performing a connection test after the N-

400 and the BL series (N-48 or BL-U1) are connected with the RS-485 cable.

Note: To use the connection test mode, ensure that the settings of the connected

BL series and those of the N-400 are switched to “multidrop link” mode.

1) When you press and hold the N-400 test switch for approximately 2 seconds

after the power to all devices is turned ON, the connection test mode is acti-

vated. The N-400 displays the ID number of the device being tested. If the

devices are properly connected, the ID number is automatically incremented.

2) If any device is not connected or is improperly connected, the ID number

corresponding to the device flashes.

To go to the next step during the connection test, press the test switch once.

Example 1

When ten BL series (ID Nos. 1 to 10) are connected:

The displayed ID number automatically changes from “1” to “10”, and then “11”

will flash if the connection test result is “OK”.

Example 2

When fourteen BL series (ID Nos. 3 to 16) are connected:

When “1” flashes, press the test switch once. When “2” flashes, press the test

switch again. The displayed number changes from “3” to “16”, and then “17” will

flash if the connection test result is “OK”.

3) If an ID number of any BL series flashes, the BL series unit is not properly

connected. After checking the following points, perform the connection test

again.

• Check that the RS-485 communication parameters (baud rate, data length,

parity and stop bit length) of the N-400 match to those of the BL series.

• Check that the BL series is set to “multi-drop link” mode.

• Check that all cables are properly connected. Ensure that the connections are

not branched and that no cables are connected using the terminal block. (

➮

See pp. 19, 20 and 25.

)

• Check that the equipment terminators at both ends of the connection are ON

and the terminators of other equipment are OFF.

• Check that the BL series’ ID numbers are properly assigned. Make sure that the

same ID number is not assigned to different devices.

4) Pressing and holding the test switch for approximately 2 seconds again resets

the connection test mode.

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 149 150

No comments

Keyence N-400 User Manual Page 34