Advantech AMAX-5000 Series User Manual page 141

6.2.6.2 Position Measure - Encoder x4
The Behavior of A/B Phase 4X Quadrant Counter
Below figure shows the counter behavior of Encoder x4 mode. Ch_A and Ch_B are
A/B phase encoder signal. If the "A" pulse is rising 90° ahead of the "B" pulse, the
counter value is increasing; if the "B" pulse is rising 90° a head of the "A" pulse, the
counter value is decreasing.
Blue are the 0x6000, 0x7000, 0x8000 parameters.
Red are the external signals.
The counter direction can be reversed by setting the Reversion_Of_Rotation
(0x8000:06), the following table is the list of all Encoder x4 mode related parameters.
Table 6.20: Encoder x4 Mode parameter index
Name
Counter_Value
Status_of_Input_A
Status_of_Input_B
Reversion_Of_Rotation
Figure 6.24 Encoder Mode – A/B Phase 4X)
Index
0x6000:11
0x6000:09
0x6000:0A
0x8000:06
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