Delta Tau Geo Brick, User Manual

Page: 52 / 294

Geo Brick Drive User Manual
Pinouts and Software Setup 52
Note
These MACRO IC0 Clock settings are optimized for a good Analog
Output signal. If the Brick is a MACRO Ring Controller then the
analog output signal quality is compromised with a much lower PWM
frequency, or should not be used at all.
For Help with clock calculations, download the Delta Tau Calculator:
DT Calculator Forum Link
J9 Analog Output Suggested M-Variable
// I/O 10 & 11 Mode (PWM)
M7051->Y:$78404,10,1
M7052->Y:$78404,11,1
M7051=0
; =0 PWM, =1 PFM
M7052=0 ; =0 PWM, =1 PFM
// Analog Output M-variable
M7050->Y:$78412,8,16,S
// These I/O nodes have to be setup once on power-up.
// power-up PLC Example
Open PLC 1 clear
I6612=100*8388608/I10 While(I6612>0) Endw
M7051=0 ; PWM mode
M7052=0 ; PWM mode
Disable PLC 1
Close
Testing the J9 Analog Output
With I6800=816, writing directly to the assigned M-variable (i.e. M7050) should produce the following:
M7050
Single-Ended:
Gnd

Differential:

Output-
-10V -20V
-408 -5V -10V
0 0V 0V
408 +5V +10V
816 +10V +20V
Note
Writing values greater than I6800 (i.e. 816) in M7050 will saturate the
output to 10, or 20 volts in single-ended or differential mode
respectively
Note
MACRO connectivity provides more solutions for analog outputs, e.g.
using ACC-24M2A.