Accessory 24E2S
UMAC Software Setup
19
UMAC Turbo Example Setups
The following section shows how to quickly setup the key variables for a stepper motor (PFM) system.
The Acc-24E2S has three modes of outputs which are setup by either the Turbo UMAC or the MACRO
CPU. The output modes available for the Acc-24E2S are Direct PWM, DAC, or PFM, but only use the
PFM output because of the hardware limitations.
To setup the output mode for the UMAC Turbo, set I7mn6 to the proper value. The Gate Array on the
Acc-24E2S has three outputs per channel as shown below:
I7mn6 Setting
A Output
B Output
C Output
I7mn6=0
PWM
PWM
PWM
I7mn6=1
DAC
DAC
PWM
I7mn6=2
PWM
PWM
PFM
I7mn6=3
DAC
DAC
PFM
For this example, the factory defaults for the other variables will allow the PFM outputs to be commanded
with a low true Amplifier Fault and
Limits plugged in. If this is not the case, modify Ixx24.
Example:
4-axis PFM from base address $078200 (servo IC2). Jumpers E1 through E4 must be set to 1-
2 on Acc-24E2S for PFM outputs and E11 through E14 must be jumpered for amplifier enable outputs.
Assume that not all stepper motors have encoders for feedback.
For this type of system, make sure I7mn6 is set for DAC and PFM output mode.
I7216=3
;CH1A and CH1B ouputs will be DAC and CH1C output will be PFM
I7226=3
;CH2A and CH2B ouputs will be DAC and CH2C output will be PFM
I7236=3
;CH3A and CH3B ouputs will be DAC and CH3C output will be PFM
I7246=3
;CH4A and CH4B ouputs will be DAC and CH4C output will be PFM
I7210 = 8 ;Simulated feedback for channel 1
I7220 = 8 ;Simulated feedback for channel 2
I7230 = 8 ;Simulated feedback for channel 3
I7240 = 8 ;Simulated feedback for channel 4
I102=$078204
;Command output to CH1A address (default a 2) for
;Stepper
I202=$07820C
;Command output to CH2A address (default a 2)
;for Stepper
I302=$078214
;Command output to CH3C address (default a 2)
;for Stepper
I402=$07821C
;Command output to CH4C address (default a2)
;for Stepper