X34，X35 模拟输出口，其中有两个模拟口（X1，X2 ）用作模块诊断测试用，它可以用来跟踪一些数字量，比如转速，电压和电流等并把它转换成0到5V的模拟电压输出，具体的输出信号可以通过数控系统选择.



Three 8–bit digital/analog converter (DAC) channels are available. An analog
image of various drive signals can be connected through to a test socket via
these D/A converters.
The three DAU channels are assigned, as standard, with the following drive
signals:
DA1: Current setpoint Default shift factor: 4
DA2: Speed setpoint Default shift factor: 6
DA3: Actual speed Default shift factor: 6
M: Reference point (ground)
Resolution: 8 bits
Voltage range: 0..0.5 V
Maximum current: 3 mA

光盘资料840DFBAN.PDF还有补充说明
3.9 DAC parameterization (available soon)