Emerson Bristol ControlWave ExpressPAC Instrukcja Obsługi Pobierz pdf (Strona 56)

ControlWave ExpressPAC Instruction Manual (CI-ControlWave EPAC)

3-10 I/O Configuration and Wiring Revised Mar-2011

3.3.5 Non-Isolated Pulse Counter/Discrete Inputs on TB5 of

CPU/System Controller Board

CPU/System Controller board connector TB5 provides interface to two

internally sourced open collector pulse counter/discrete inputs (Pulse1

and Pulse2) with a 1 second scan rate. Pulse counters act like high speed

counters but cannot function with contact relays because they lack

contact debounce circuitry.

Table 3-7. Non-Isolated Pulse Counter/Discrete Inputs General

Characteristics

Type Number

Supported

Characteristics

Pulse Counter /

Discrete Inputs

2 on TB5 of

CPU/System

Controller

board

 Signal conditioning circuitry provides

20 microsecond filtering.

 Surge suppression.

 Maximum input frequency for each

pulse counter/discrete input circuit is

10 KHz.

Wiring

Pulse counter/discrete inputs are field driven by open collector circuits

and are sourced for 3.3V (internally) with a 200μA source current. See

Figure 3-3 for information on the open collector wiring arrangement.

Figure 3-3. Pulse Input Wiring Diagram

Software Configuration

To use data from these pulse counter/discrete inputs you must include

a CWM_ECPU board in your ControlWave project using

ControlWave Designer’s I/O Configurator, and then configure it. See

the ControlWave Designer Programmer's Handbook (D5125) for more

information. That same manual includes an I/O Mapping section that

describes, for advanced users, the I/O map for this board. To read a DI

value, look at the appropriate offset for the _STATE variable for the

board.

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 95 96

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