Instruction Manual

6-7

6-3 Command Communication with BL/SR/RF Series Devices

Serial Communication

This section describes command communication examples. (The N-410 Series is in the Auto-polling

mode)

[Example 1] The trigger input ON command (LON) is sent to the BL Series device that has an ID

number 3 and data to read (KEYENCE) is received.

* The time between (2) and (3) fluctuates due to reading conditions of the BL Series

until the N-410 Series receives data.

[Example 2] The trigger input ON command (LON) is sent to the BL Series device that has an ID

number 3, but the read data is not returned within a certain period. Therefore, the

trigger input OFF command (LOFF) is sent.

* Determine the interval of sending the command for timing OFF (between (2) and (3))

according to operation.

[Example 3] The trigger input ON command (LON) is sent to the BL Series device that has an ID

number 3 but the connection of the ID number 3 (BL Series device) is not confirmed.

* It takes approximately 10 to 15 seconds between (1) and (2) according to the

connection condition.

Operation Command/Response

(1) Send the trigger input ON command %T03-LON

(2) Respond to (1) %T03-OK

(3) Receive read data %P03-0011KEYENCE

Operation Command/Response

(1) Send the trigger input ON command %T03-LON

(2) Respond to (1) %T03-OK

(3)

Send the trigger input OFF command

%T03-LOFF

(4)

Respond to (3)

%T03-OK

(5)

Receiving a read error

%P03-0009ERROR

Operation Command/Response

(1) Send the trigger input ON command %T03-LON

(2) Error due to a connection is not confirmed %T03-NC