INFICON HLD6000 Refrigerant Leak Detector Interface Description - Manual (Page 35)

Fieldbus Communication 35
4.4 Acyclic Data Transfer
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.
4.4.1 Addressing Rules for Acyclic Access
Mapping from LD command number to field bus
Fieldbus supports all commands from LD protocoll, except the commands in the
following list:
Fieldbus Rule Example for LD_command_number 506
(Mass)
PROFIBUS LD_command_number = slot * 255 + index +1
slot = (ADI-1) / 255
index = (ADI-1) MOD 255 Slot = 1
index = 250
PROFINET IO Application Process Instance (API) = 0
Slot = 0
Subslot = 1
Index = LD_command_number
API = 0
Slot = 0
Subslot = 1
Index = 506dez = 01FAhex
DeviceNet Object number A2h (ADI object)
Instance_number = LD_command_number Instance_number = 506
EtherNet/IP Object number A2h (ADI object)
Instance_number = LD_command_number Instance_number = 506
LD_Command number Name
26 Interface protocol (read only)
27 Used interface
275 Cal history
287 Error history
294 Text of error number
295 Text of warning bit
341 Last entry in long term history list
342 Long term history list
408 Serial number IO module
423 Speaker beep
426 Front panel LED state
450 Date+Time [YMDhms]
457 COOL-Check information
458 Probe HEX code
619 Pump power attenuation
1145 Gas correction factor
1161 Parameter reset