Keyence BL-180 User Manual download pdf (Page 25)

2.4 Test Mode

Test mode can be used for the bar code reading test. Because trigger input is not

required, this mode allows you to perform a reading test easily. You can select

one of the following 3 methods to enter the test mode.

Send the command

Enter test mode by sending the serial command for the test mode (TEST1,

TEST2). Commands should be entered in all uppercase characters.

Turning on trigger input

You can use the BL-180 to switch to test mode by turning on the trigger input (see

page 35). If you select this method to enter the test mode, trigger input is disabled

to ensure normal operation.

Turning on power supply

You can set the BL-180 to enter test mode by turning on the power supply (see

page 37).

When you try to enter the test mode by turning on trigger input, you cannot use

the serial command to enter the test mode.

The following 2 types of test modes are available:

Reading rate check mode

The unit scans a bar code100 times and analyzes how many times it can decode

the scanned data (reading rate). This mode is useful in the following cases:

• When adjusting the mounting distance and angle

• When verifying the reading stability of the bar code to be used

• The analyzed result will be output anytime (every 100 scans) using the follow-

ing format:

m = 0 to 100 (zero-suppressed)

• Although an OK/NG signal is not output, the OK/NG LED lights (see page 19).

Tact check mode

In this test mode, the unit counts how many scans can be decoded (the decode

count) while reading one bar code.

This mode is useful when testing which line speed can be expected when actually

implementing the BL-180 system on the line.

• The analyzed data is output using the following format 0.2 seconds after the

bar code has passed the LED beam’s ﬁeld.

m = 1 to 999 (zero-suppressed)

• The unit continues to read a bar code while the code is in the LED beam’s ﬁeld

and does not output the result. If the LED beam does not detect a bar code for

0.2 seconds, the unit stops scanning and outputs the result.

• If the unit reads the same bar code twice within the 0.2 seconds, the unit can-

not separate the bar codes and will add to the read count. However, the unit

can continuously reads different bar codes within the 0.2 seconds by recogniz-

ing the delimiter.

Note

Delimiter

Readout data

: m %

Delimiter

Readout data

: m

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 108 109

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Keyence BL-180 User Manual Page 25

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