Rockwell-automation 1760-DNET Pico DeviceNet Communications Module Use Manual de usuario descargar pdf (Pagina 68)

Publication 1760-UM003A-EN-P - September 2005

6-24 Application Examples for Pico

Example:

Data 1 (Byte 4) = 0x07

Meaning:

The values appear in the Parameter menu. The counter is used in the

mode of the frequency meter. The counter setpoint 1 is not assigned

to a constant and cannot therefore be written to.

Table 6.44 Operand overview

Index

(hex)

Operand Read Write

00 Parameters Table 6.45 x

01 Control byte Table 6.46 x

02 Process variable

(1)

(1) A 16-bit value is transferred in data bytes Data 1 – Data 2. It should be remembered that

Data 1 is the low byte and Data 2 the high byte.

(2)

(2) The value can only be written if it is assigned to a constant in the program.

03 Counter setpoint 2

(1)

(2)

Table 6.45 Index 00 – Parameters

Meaning Bit76543210

Appears in the parameter menu

Yes/no 0/1

Counter mode

FB not used 0 0

Up/down counter (N) 0 1

High-speed up/down counter (H) 1 0

Frequency counter (F) 1 1

Use as constant and therefore can be written to

Counter setpoint S1 0/1

Unused bits – – – –

Table 6.46 Index 01 – Control byte

Data 1 Bit76543210

FB output – – – –

(1)

(1) Count coil, counts on every rising edge

(2)

(2) Reset, the timing relay is reset (reset coil)

(3)

(3) Count direction: 0 = up counting, 1 = down counting

(4)

(4) Switch contact

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 167 168

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Rockwell-automation 1760-DNET Pico DeviceNet Communications Module Use Manual de usuario Pagina 68

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