IFM Electronic CR0403 Programming Manual page 73

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ifm function elements
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CAN_RX
Unit type = function block (FB)
Unit is contained in the library ifm_RawCAN_NT_Vxxyyzz.LIB
Symbol in CODESYS:
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Description
CAN_RX is used for receiving a message.
The FB limits itself to a few functions and the required memory space is low.
CAN_RX filters for the set identifier. If several CAN messages with the same identifier are received in
one cycle, only the last / latest message is available.
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Parameters of the inputs
Parameter
ENABLE
CHANNEL
ID
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Parameters of the outputs
Parameter
DATA
RESULT
Possible results for RESULT:
Value
Description
dec | hex
0 00 FB is inactive
1 01 function block execution completed without error
5 05 FB is being processed – still receiving
9 09 CAN is not active
242 F2 Error: setting is not possible
BasicController (CR0403) Runtime System V03.02
Data type
BOOL
BYTE
DWORD
Data type
ARRAY [0..7] OF BYTE
BYTE
73
ifm function elements for the device CR0403
Description
TRUE: execute this function element
FALSE: unit is not executed
> Function block inputs are not active
> Function block outputs are not specified
CAN interface (1...n) depending on the device
Number of the data object identifier:
normal frame (2 IDs):
11
0...2 047 = 0x0000 0000...0x0000 07FF
Extended Frame (2 IDs):
29
2 048...536 870 911 = 0x0000 0800...0x1FFF FFFF
Description
received data, (1...8 bytes)
feedback of the function block
(possible messages → following table)
2015-04-01
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