Balluff Ethernet/IP BTL7-V50D Series, Configuration Manual

10

english

There are two different options for controlling the behavior 

of the BTL7-V50D-… using PLC: Parameterization using 

Config-Assembly

 or changing the attributes of the 

Position 

Sensor Object

 and the device configuration object.

Config-Assembly

 is configured in the control and is 

transmitted by this to BTL7-V50D-… with every start. This 

makes the BTL7-V50D-… easy to exchange in case of 

malfunction, because the replacement device is 

automatically configured in exactly the same way as its 

predecessor when it is started. The disadvantage is that 

there are limited setting options. Parameterization using 

the 

Config-Assembly

 takes priority over the settings saved 

in the device. The parameters of the 

Config-Assembly

are not saved.

Further details are described in 

Parameterization using the 

Config-Assembly

 on page 16.

Parameterization using the attributes of the 

Position 

Sensor Object

 and the device configuration object offers 

many more setting options. However, the parameters must 

be transmitted using explicit messages, which is more 

complex within the scope of a PLC program if a 

configuration tool is not used. The set parameters are 

saved in the sensor and remain valid after each restart,  

as long as they are not temporarily overwritten by 

parameterization using the 

Config-Assembly

.

5.1 

Attributes of the 

Position Sensor Object

The 

Position Sensor Object

 represents an absolute 

position sensor. In the BTL7-V50D-… there are 

16 instances of this object, which are assigned to the 16 

possible magnets. If the magnets are not parameterized or 

not available, corresponding instances are still available 

and then contain error values.

Because one of the 

Position Sensor Object

 own instances 

is assigned to each magnet, the position data of each 

magnet can be configured independently of each other in 

relation to scaling, offset, units, measurement direction and 

increment. For example, the position value of magnet 1 

can be output in micrometers and with a positive 

measurement direction, whilst the position value of 

magnet 2 is represented in the opposite measurement 

direction and in millimeters.

Attribute changes on the 

Position Sensor 

Object

 are always immediately saved!

5 

Configuration and parameterization

If settings are made using the startup parameters (see 

chapter 

Parameterization using the Config-

Assembly

 on page 16), then these take priority over the 

attributes in the 

Position Sensor Object

. However, they do 

not overwrite them and are not saved either. In contrast, 

settings in the web server can be saved and change the 

corresponding values in the 

Position Sensor Object

.

See 

Attributes of the Position Sensor Object (class 35 

(0x23))

 in the appendix on page 33 for an overview of 

attributes.

5.1.1  Position settings

The position value is influenced by the attributes 12, 14, 

15, 18, 19 and 51.

Value ranges can be left if required when setting 

units, scalings or offset. Then not all positions 

will be represented.

For example, the value range in the nanometer 

setting only ranges up to 2.14 m and is 

therefore not suitable for longer nominal 

lengths.

Attribute 10:

Position value (

Position Value Signed

)

The position value is output as a signed 32 bit value and is 

influenced by attributes 12, 14, 15, 18, 19 and 51. The 

internal resolution of the position sensor (Counts) is 1 μm, 

although nanometers (nm) can also be set as the output 

format. Make sure the unit is selected in a way that allows 

the measurement range to be represented. The output 

value is identical with the value in 

I/O Assembly Object

.

See Tab. 9-1 on page 32 for an overview of possible 

units.

Attribute 12:

Measurement direction reversal (

Direction Counting 

Toggle

)

The null point for the position is located at the connector 

end on delivery. The positions are counted up as the 

magnet moves away from the connector. If this attribute is 

set to TRUE, the count direction is reversed. The position 

value which was previously assigned to the beginning of 

the measuring range (null point) is shifted by an amount 

equal to the nominal length towards the end of the BTL 

after setting this attribute.

This parameter has the same function as the entry 

Direction_Counting_Toggle

 in the 

Config-Assembly

(see chapter 5.3.5 on page 16).

If 

Config_assemby_parameter_recognition

 is activated, 

the settings in the 

Config-Assembly

 are decisive and 

attribute 12 is ignored.

BTL7-V50D-…

Configuration Manual