Rockwell-automation 1794-IP4 Series B FLEX I/O PULSE COUNTER User Manu Manual de usuario descargar pdf (Pagina 13)

1–3Overview of the Pulse Counter Module

Publication 1794ĆUM016B-EN-P - August 2002

The Pulse Counter module performs high-speed scaling calculation

operations for various industrial applications. The module interfaces

with a FLEX I/O family adapter which then communicates with a

programmable controller processor that has block-transfer capability

and external I/O devices.

The adapter/power supply transfers data to the module (block

transfer write) and from the module (block transfer read) using BTW

and BTR instructions in your ladder diagram program. These

instructions let the adapter read input values and status from the

module, and let you write output values and configure the module’s

mode of operation. The following illustration describes the

communication process.

ADAPTER

ACTIVE FAULT

LOCAL

FAULT

24VDC

POWER SUPPLY

RIO ADAPTER

1794ĆASB



The adapter transfers your configuration data

to the module using a BTW.

Flexbus

External devices transmit

frequency signals to the modĆ

ule.

The module converts

frequency signals into integer

format and stores these

values until the adapter

requests their transfer.

Your ladder program instructs the

adapter to perform a BTR of the

values and stores them in a data

table.

The adapter and module determine

that the transfer was made without

error and input values are within speciĆ

fied range.

Your ladder program can use and/or move the data (if valid)

before it is written over by the transfer of new data in a

subsequent transfer.

Your ladder program performs BTWs to the module when you

power it up, and any time you wish to reconfigure the module.

4 CH Pulse Counter Module

1794-IP4



What the Pulse Counter

Module Does

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 70 71

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Rockwell-automation 1794-IP4 Series B FLEX I/O PULSE COUNTER User Manu Manual de usuario Pagina 13

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