Lenze EPL10200 - Page 86

System bus (CAN) with Servo PLC & Drive PLC
System blocks
7.1 FIF_CAN1_IO
7-4
L
PLC-Systembus EN 1.1
Process data telegram
The process data telegram consists of an
identifier and 8 bytes of user data.
11 Bit 8-byte user data
Identifier Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Identifier
Information about the identifier can be found in chapter 2.3.1.
(^ 2-2)
User data
The 8 bytes of user data to be transmitted can be written by several variables of different data types
at the same time. This allows the PLC to transmit data - as required - as:
• binary information (1-bit)
• quasi-analog value (16-bit)
• phase-angle information (32-bit)
:
Byte Variable (1-bit) Variable (16 -bit) Variable (32 -bit)
1, 2 FIF_CAN1_bFDO 0 _b
...
FIF_CAN1_bFDO 15 _b
FIF_CAN1_nOut W0_a
3, 4 FIF_CAN1_bFDO 16 _b
...
FIF_CAN1_bFDO 31 _b
FIF_CAN1_nOut W1_a
5, 6 FIF_CAN1_bFDO 32 _b
...
FIF_CAN1_bFDO 47 _b
FIF_CAN1_nOut W2_a
F
I
F
C
A
N
1
d
n
O
u
t
D
1
p
7, 8 FIF_CAN1_bFDO 48 _b
...
FIF_CAN1_bFDO 63 _b
FIF_CAN1_nOut W3_a
FIF_C
A
N1_dnOu
t
D1_p
Tip!
Make sure that a byte to be transmitted is not at the same time written by different variable types to
ensure data consistency.
• For writing bytes 1 and 2, either use only the variable FIF_CAN1_dnOutD1_p, only the variable
FIF_CAN1_nOutW0_a or only the variables FIF_CAN1_bFDO0_b ... FIF_CAN1_bFDO15_b .
Show/Hide Bookmarks