Inficon LDS3000 Modular Leak Detector Interface descriptio Manual do Utilizador descarregar pdf (Página 51)

Fieldbus Communication 51

6.4 Acyclic Data Transfer

Information If you want to use acyclic data transfer with PROFIBUS, you must use

a PROFIBUS master which supports DPV1 data transfers. A

PROFIBUS master which supports DPV0 only, can only use cyclic data

transfer

6.4.1 Addressing Rules for Acyclic Access

Application data instance (ADI) is equal to LD command number.

Calibarion

request

0 = CAL request function disabled

1 = 0x01 = CAL request function enabled but

no CAL requested

2 = 0x02 = CAL request function enabled and

CAL requested

3 = 0x03 = not used

CAL request

*CONFIG:CA

LREQ?

419

Emission

0 = 0x00 = Emission off

1 = 0x04 = Cathode 1 fixed

2 = 0x08 = Cathode 2 fixed

3 = 0x0C = Cathode 1 auto

4 = 0x10 = Cathode 2 auto

Emission on

*STATUS:C

ATHODE?

530

State

0 = 0x00 = Standby

1 = 0x20 = Error

2 = 0x40 = Calibration

3 = 0x60 = Runup

4 = 0x80 = Measure

5 = 0xA0 = Emission Off

6 ... 7 = 0xC0…0xE0 = not used

Run up, CAL

active, Error,

Ready

*STATUS?

Status

word

Leak rate

(mbar·l/s)

Actual leak rate in mbar·l/s (IEEE 754 float

value)

Recorder

output

(LR_LIN,

LR_LOG ...)

*READ:MBA

R*l/S?

129

Pressure Pressure in mbar(IEEE 754 float value)

Recorder

output (P1)

*MEAS:P:MB

AR?

Actual error

number

Error / warning code (16 bit unsigned integer)

*STATUS:E

RROR?

290

Fieldbus Rule Example

PROFIBUS

ADI = slot · 255 + index + 1

slot = (ADI - 1) / 255

index = (ADI - 1) MOD 255

LD command 506 (Mass):

Slot = 1

index = 250

CANopen index = 2000h + ADI

ModbusRT

holding register [1 ... 16] = 210h + (ADI -

1) · 16 + ADI_array_index

ModbusTCP

holding register [1 ... 16] = 210h + (ADI -

1) · 16 + ADI_array_index

DeviceNet Instance_number = ADI

EthernetIP Instance_number = ADI

CCLink no acyclic access available

1 2 ... 46 47 48 49 50 51 52 53 54 55 56

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