Figure 3.21Up/Down, With Reload, Count Once - Advantech APAX-5013 User Manual

Up/Down, With Reload, Count Once
Figure 3.7 shows up/down mode, Ch0_A provides the counting up function, one
pulse, one up count. Ch0_B provides the counting down function, one pulse, one
down count. When the counter0 is enabled, the couner0 starts to count. If the counter
value is overflow or underflow, it will reset to the defined value (e.g. 0x33) but won't
keep counting.
Ch0_A
Ch0_B
Counter0
Enable
Counter0
0x33 0x34
Value
Counter0
Underflow
Ch0_A
Ch0_B
Counter0
Enable
Counter0
0x33 0x32
Value
Counter0
Overflow
Figure 3.21 Up/Down, With Reload, Count Once
0x35 0x36 0x35 0x34
0x31 0x30 0x31 0x32
67
.........
0x00 0x33
.........
0xF..F 0x33
APAX-5000 I/O Series User Manual