Rockwell-automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual Manual de usuario descargar pdf (Pagina 74)

Publication 1794-UM064B-EN-P - May 2014

62 Communicate With Your Module

Write Word 2 Bit 03 Counter Preset bit – A positive edge on this bit moves the value in Preset X to Counter X, independent of Preset Enable.

Bit 04 Preset Enable bit – When set (1), a positive edge on Z preloads Counter X = Preset X, independent of Cal Enable.

Bit 05 Count Enable bit – When set (1), the incremental encoder is counting.

Bits 06…08

(06…10)

Calibration Control bits – bits 06, 07 and 08.

06 Enable bit – When set (1), the counter can be calibrated.

07 Direction bit – When set (1), calibration is performed in a negative direction; when reset (0), calibration is

performed in a positive direction.

08 Reset bit – Calibration is acknowledged and a new calibration is enabled on a positive edge on this bit.

Bits 09…10

(11…12)

10 09 Gate Control bits

0 0 No gate function on input G.

0 1 Counting only if G is high (active).

1 0 Counting only if G is low (inactive).

1 1 Calibration if G is high (active).

Bits 11…12

(13…14)

12 11 Latch Control bits

0 0 Save the counter value on the positive edge of Z (if Stored X = 0).

0 1 Save the counter value on the positive edge of G (if Stored X = 0).

1 0 Save the counter value on the negative edge of G (if Stored X = 0).

1 1 Save the counter value on the positive and negative edges of G (if Stored X = 0).

Bit 13 (15) Rollover bit – When set (1), the counter counts up to the preset and then restarts at 0. If this bit is reset (0) (not rollover),

the rollover preset value = FFFF

hex = 65535 (decimal).

Bit 14 (16) Ch 1 Preset Reset bit – A positive edge on this bit resets Stored X in Signals.

Bit 15 (17) Ch 1 Store Reset bit - A positive ege on this bit resets Preset Reached in Signals.

Write Word 3 Bits 00…15

(00…17)

Ch 0 Preset – Value to load or compare with counter 0.

Write Word 4 Bits 00…15

(00…17)

Ch 1 Preset – Value to load or compare with counter 1.

Write Word 5 Filter Selection

Bit 00 Ch 0 Filter Enable – When set (1), and a counter 0 is in mode 000 (pulse counting), signal A0 is filtered by a digital low

pass filter with selectable filter constant.

Bit 01 Ch 1 Filter Enable – When set (1), and a counter 1 is in mode 000 (pulse counting), signal A1 is filtered by a digial low

pass filter with selectable filter constant.

Bit 02…07 Unused.

Bits 08…09

(10…11)

(11)

(10)

Filter bits – This constand is common to both counters.

0 0 73.5 kHz or minimum 0.007 ms pulsewidth.

0 1 37.8 kHz or minimum 0.013 ms pulsewidth.

1 0 12.8 kHz or minimum 0.04 ms pulsewidth.

1 1 1.2 kHz or minimum 0.4 ms pulsewidth.

Write Words

6…7

Bits 00…15

(00…17)

Not used – set to 0.

1794-ID2 Pulse Counter Module Word/Bit Definitions for Block Transfer Read Words

Word Bit Definition

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 152 153

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Rockwell-automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual Manual de usuario Pagina 74

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