IFM CR0452 - Page 53

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ifm Programming Manual BasicDisplay CR0452 v03.02 05 / 2018
ifm function elements ifm function elements for the device CR0452
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CAN_ENABLE
7492
Unit type = function block (FB)
Unit is contained in the library ifm_RawCAN_NT_Vxxyyzz.LIB
Symbol in CODESYS:
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Description
7494
With CAN_ENABLE the CAN hardware is initialised. Without this call no other calls are possible in
RAW-CAN or they return an error.
In order to change the baud rate the following procedure is required:
► Maintain the function block on ENABLE=FALSE for the duration of one cycle.
> All protocols are reset.
> Re-initialisation of the CAN interface and the CAN protocols running on it. Any information
available for cyclical transmission is lost as well and must be newly created.
> At renewed ENABLE=TRUE, the new baud rate is adopted.
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Parameters of the inputs
7495
Parameter
Data type
Description
ENABLE
BOOL := FALSE
TRUE: enable CAN interface
FALSE: disable CAN interface
CHANNEL
BYTE
CAN interface (1...n) depending on the device
BAUDRATE
WORD := 250
Baudrate [kbits/s]
permissible = 20, 50, 100, 125, 250, 500, 1000
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Parameters of the outputs
8530
Parameter
Data type
Description
RESULT
BYTE
feedback of the function block
(possible messages → following table)
Possible results for RESULT:
Value
dec | hex
Description
0
00
FB is inactive
1
01
FB execution completed without error – data is valid
8
08
function block is active
9
09
CAN is not active
242
F2
Error: setting is not possible