Rockwell-automation 57C422B 2 Axis Servo Module Uživatelský manuál stáhnout pdf (Strana 31)

PROGRAMMING

4-3

4.2 Register 0: Encoder Setup

feedback encoder inputs for the axis. Refer to figure 4.1.

The feedback encoder mode

bits specify how the A and B

channels from the encoder will be interpreted by the module.

If the step/direction mode is selected, a high to low transition

of Channel A causes a count. If Channel B was low, the

count is incremented. If Channel B was high, the count is

decremented.

If the step +

mode is selected, a high to low transition of

Channel A results in the count being incremented. A high to

low transition of Channel B results in the count being

decremented.

If the *1 quardrature is selected, only one edge of channel A

is counted. (Note that *1 quadrature is available only on B/M

57422-2C and later versions of the module.) If the *2

quadrature mode is selected, both the rising and trailing

edges of Channel A are counted. The direction is determined

from the state of Channel B.

Figure 4.1 – Encoder Configuration Register

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 121 122

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Rockwell-automation 57C422B 2 Axis Servo Module Uživatelský manuál Strana 31