Rockwell-automation 1794-ID2 U.MNL INCREMENTAL ENCODER Instrukcja Użytkownika Pobierz pdf (Strona 55)

5–3How Communication Takes Place and I/O Image Table Mapping with the DeviceNet Adapter

    

System throughput, from incremental encoder to backplane, is a

function of:

• the configured minimum frequency sample time

• the number of channels actually configured for connection to a

specific sensor (0 or 1)

You can set the minimum frequency time during module

configuration. The selection influences the sample data rate, thus

affecting system throughput.

The number of channels included in each input scan also affects

system throughput.

FLEX I/O incremental encoder module data table mapping is shown

below.

Incremental Encoder Module (1794ĆID2) Image Table Mapping

Module Image

I/O Image

Input Size

Output Size

   

   

G0 Z0 B0 A0S1 S0 C1 C0RZ1G1 A1B1PD0PD1

Store 0 - Saved Counter Value on channel 0

Store 1 - Saved Counter Value on channel 1

Channel 0 - current counter value on channel 0

Channel 1 - current counter value on channel 1

Channel 0 - Counter word readback

Channel 1 - Counter word readback

Code for identification of software version

Channel 0 Control Word- sets the function of counter 0

Channel 1 Control Word - sets the function of counter 1

Channel 0 Preset - value to load or compare with counter 0

Channel 1 Preset - value to load or compare with counter 1

Not used

Control Word 2 - Sets filter function for both channels

System Throughput

Mapping Data into the

Image Table

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 87 88

Brak uwag

Rockwell-automation 1794-ID2 U.MNL INCREMENTAL ENCODER Instrukcja Użytkownika Strona 55