138
Operation Theory
4.7.3 Position Latch
The position latch is different than the position compare function in
the following way: the position compare function triggers a pulse
output via the CMP, when the comparing condition comes into
existence, the position latch function receives pulse inputted via
the LTC, and then captures all data in all counters at that instant
(refer to section 4.4). The latency between the occurring latch sig-
nal and the finish position of the captured data is extremely short
as the latching procedure is done by hardware. Only axes 2 and 3
can perform a position latch function. LTC3 (axis 2) and LTC4
(axis 3) are used to receive latch pulses.
To set the latch logic use
_8164_set_ltc_logic()
.
To obtain the latch values of the counters use
_8164_get_latch_data(AxisNo, CntNo, Pos)
. The sec-
ond parameter “CntNo” is used to indicate the counter of which the
latched data will be read.
Related function
:
X
_8164_set_ltc_logic(),_8164_get_latch_data( : refer to sec-
tion 6.16
Summary of Contents for MPC-8164
Page 4: ......
Page 12: ......
Page 14: ...2 Introduction Figure 1 1 PCI 8164 block diagram ...
Page 50: ...38 Installation ...
Page 70: ...58 Signal Connections ...
Page 74: ...62 Signal Connections 3 17 1 Isolated input channels 3 17 2 Isolated output channels ...
Page 75: ...Signal Connections 63 3 17 3 Example of input connection ...
Page 76: ...64 Signal Connections 3 17 4 Example of output connections ...
Page 109: ...Operation Theory 97 ...
Page 110: ...98 Operation Theory ...
Page 111: ...Operation Theory 99 ...
Page 112: ...100 Operation Theory ...
Page 113: ...Operation Theory 101 ...
Page 148: ...136 Operation Theory Users can use this function to check if auto trigger is running Results ...
Page 280: ...268 Connection Example Figure 7 2 Connection of PCI 8164 with Panasonic Driver ...
Page 287: ...Connection Example 275 7 3 3 Mechanical Dimensions ...
Page 297: ...Connection Example 285 7 5 2 Mechanical Dimensions ...
Page 300: ...288 Connection Example 7 6 Wiring with DIN 814M J3A ...
Page 304: ...292 Connection Example 7 7 Wiring with DIN 814Y ...
Page 308: ...296 ...