7-12 HARDWARE INTERFACE PARAMETERS
SB1391 Hardware and Setup Guide - Document revision no. 1.14
7.5.4. Analog Output
There is one ten bit analog output available - A_OUT. Its value is controlled by the XD4 axis
parameter. The output voltage range is -10V (XD4= -511) to +9.99V (XD4=511). The analog
output can be used to monitor motion and other real time variables.
The analog output is accessible via the I/O connector and via a test point on the bottom of the
control module.
The actual velocity, position, position error, master position, and the current (= torque) commands
can be monitored via the axis analog parameter D4. The analog output is a 10-bit digital to analog
converter (DAC). The function of the analog output is controlled by three parameters - MN
(Monitor), DC (Data Collection), and MF (Motion Factor).
7.5.4.1. Motion Monitoring Parameters
The MN (Monitor) parameter determines the source of the analog output.
TABLE 7-6 MN (M
onitor)parameter
MN value Source of analog output is
MN=0
determined by the XD4 parameter.
MN=1
velocity signal.
MN=2
drive vector current (torque) signal.
MN=3
determined by the bit assignment of the DC (Data
Collection) parameter.
When MN = 3, it is the Data Collection (DC) bit assignment that defines the source of the analog
output. If more than one DC bit is set, only the least significant bit is read.
TABLE 7-7 DC (Data Collection) parameter bit assignment
Bit 11 - 15 10 9 8 7 6 5 4 3 2 1 0
Parameter
0 DSP IO 0 0 A<channel> MP D2 DO/D1 PE CP LV
For more information about the DC parameter, refer to the ACSPL Software Guide.
The MF (Monitor Factor) is available for scaling for scaling the internal digital source fed to the
analog output's DAC.
Analog output signal = (internal digital source) x 2
MF
x (10[volts]/512)
To prevent an overflow, MF must adhere to the following condition:
-511 < (internal digital source) x 2
MF
< 511
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