Table of Contents - TG Drives
Table of Contents - TG Drives
Table of Contents - TG Drives
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
EXTENDED REGISTER GROUPS<br />
CAPTURE, Capture exact time <strong>of</strong> external events<br />
FUNCTION<br />
The capture uses the digital input 1 (or the Encoder reference input) as trigger<br />
source for the event. The electrical time constant for this input is much shorter<br />
when used by this function, than it is for the normal In.Di1 function. This means<br />
that the noise immunity is lower for this function.<br />
Capture.Mode<br />
Capture.Time<br />
Capture.FTime<br />
Capture.Pos<br />
Capture.RPos<br />
Capture.Speed<br />
The capture function can be set up to occur on positive,<br />
negative or both edges <strong>of</strong> the input signal. This setting is<br />
made in the Capture.Mode register and is not affected by<br />
the in.level bits.<br />
When the Capture.Enable register has been set, the first<br />
condition met will cause the HW interrupt to sample the<br />
absolute time and store this in Capture.Time.<br />
The Capture.FTime register will hold the time within the<br />
cycle for the interrupt in microseconds.<br />
The Capture.Pos and Capture.RPos will be extrapolated<br />
with that time from the real sampled values <strong>of</strong> RD1.Pos<br />
and RD1.RPos.<br />
The Capture.Speed will be the sampled value <strong>of</strong><br />
RD1.Speed.<br />
When this interrupt is serviced, the Capture.Enable will be<br />
cleared.<br />
If the Vector.CapInt is defined and the Int.SysMask bit 1 is set, the program will<br />
start to execute at the line defined.<br />
HARDWARE CHANGE<br />
The old DMC used only IN.DI1 as the high-speed input. In theDMC 2 a Encoder<br />
reference input can be used by setting capture.mode bit3.<br />
i<br />
Connector X6B has the balanced input at X6B:8 and X6B:21.<br />
THIS IS A BALANCED 5 V INPUT.<br />
The DMC 2 does not support the prescaler on the capture input that the DMC1 has.<br />
RELATED ITEMS<br />
Vector.CapInt System interrupts vector<br />
for captures event.<br />
Int.SysMask Bit mask for system interrupts.<br />
Int.SysPend Bit mask for pending events.<br />
EXAMPLE USAGE<br />
.<br />
Vector.CapInt , @Caplabl<br />
Capture.Mode,1<br />
Capture.Enable , 1<br />
or Int.SysMask , 2<br />
wait Capture.Enable = 0<br />
.<br />
.register Target<br />
Caplabl:<br />
;set up the pointer<br />
;positve edge<br />
;activate<br />
;enable the PL2 interrupt<br />
;wait for capture<br />
User's Manual 5.1 Inmotion Technologies AB<br />
Doc. No.9032 0027 01 (B), Rev. 11.07.2001<br />
119
Change language