Fastech Ezi-IO EtherCAT DA, Руководство пользователя

Страница: 34 / 52

-34-
9.2.1.6. 4~20 [mA] Current Output
In the voltage output range, the digital data 0~25,000 is converted to 4~20 [mA] output. Actually, the digital data
-1,250~26,250 is converted to 3.2~20.8 [mA].
If the digital data is greater than 26,250, it outputs 20.8 [mA]. Or if the digital data is less than -1,250, it outputs
3.2 [mA].
The following formula is used when converting digital data to analogue signals.
Analogue Output[mA] =
16
25000
× Digital Data + 4
Figure 9-6. Data Conversion for Output Range 4 ~ 20 [mA]
Output Range Setting Methods 9.2.2
9.2.2.1. Setting Output Range through SDO Communication
Set LSET switch (SW3.1) of Output Range Setting Switch (SW3) to set the output range through the SDO
communication. Enter the value of the Analogue Output Range Object (2301h) through the Master unit to set the
output range. Refer to
10.6.2 Object 2301h: Analogue Output Range for the object values.
9.2.2.2. Setting Current Output Range with DIP Switches
Set LSET switch (SW3.1) of Output Range Setting Switch (SW3) to ON to set the output range with dip switches.
Refer to the
4.1.2 Output Range Setting Switch (SW3) for more details.
Digital Data
Current
20.8 mA
25000 26250
0
-1250
3.2 mA
20 mA
4
m