Contents Introduction ..............................3 Functions of the CanBus option ........................3 Initialisation ............................3 Functions of the CanBus Interface ....................4 Using the CAN Interface ........................5 Using the ML71 measuring system......................6 ...
NTERFACE 1 Introduction The APCI-8001 / APCI-8008 control units can be optionally fitted with a CanBus interface. The CAN bus is connected at connector P2. RWMOS.ELF operating system software which contains the “optionMSM9255” option must also be used. The APCI-8001 / APCI-8008 can only act as a master and does not have an object directory itself.
(Default: 1 Mbit/s) 8000 0000 CanBusStart integer w The CanBus is started. 104 hex With this command, the CAN bus controller of the APCI-8001 / APCI-8008 is started. 8000 0000 CanBusStop integer w The CanBus is stopped. 105 hex With this command, the CAN bus controller of the APCI-8001 / APCI-8008 is stopped.
NTERFACE Table 3: CanBus interface functions (BusNumber 400) for DeviceNumber not equal to 8000 0000hex: Device Name Type Explanation Index Subindex Number 600h PP_FC_SDO_ integer Read and write access to the service data objects of CAN Index Subindex subscribers 200h PP_FC_PDO1_ integer Describe process for Number of...
APCI-8001 / APCI-8008. The measuring values are transferred to the APCI-8001 / APCI-8008 via the CAN bus. When using CAN-Bus 1 of the ML71, the measuring values can be processed individually or line by line (resource # 10000) or, in conjunction with the scanner functionality, block by block (resource # 10013).
NTERFACE 3.3 Resources for ML71 handling Table 4: List of device numbers for ML71 handling Dev.# Name Type Explanation Parameter index [Subindex] 10000 ML71 Measuring value of an ML71 Index measuring integer Measure measuring system value channel single Value (data type depending on measuring (0..127) short int system settings)
NTERFACE The size of the data block in a scan is always fixed. The number of lines in this data structure (zn) is specified in the object descriptor element “Index” in the less significant 16 bits. The number of columns (an) is specified in the object descriptor element “SubIndex”. The content of “Index” and “SubIndex”...
NTERFACE 3.5 Note on using the “ML71MeasureDataBlock” Recording data and transferring the recorded real-time data into the scanner requires computing time in the real-time task of RWMOS.ELF. For this reason, the sampling time should, where possible, not be set to below the default value of 1.28 ms. Further information on this can be found in the Commissioning Manual (CM) under the key word “SampleTime”.
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