Lenze Drive PLC - Page 90

System bus (CAN) with Servo PLC & Drive PLC
System blocks
7.2 FIF_CAN2_IO
7-8
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 first 4 of the 8 bytes of user data to be transmitted can be written by several variables of a different
data type at the same time and data can therefore - as required - be transmitted as
• binary information (1-bit)
• quasi-analog value (16-bit)
• phase-angle information (32-bit)
from the PLC program:
Byte Variable (1-bit) Variable (16 -bit) Variable (32 -bit)
1, 2 FIF_CAN2_bFDO 0 _b
...
FIF_CAN2_bFDO 15 _b
FIF_CAN2_nOut W1_a
F
I
F
C
A
N
2
d
n
O
u
t
D
1
p
3, 4 FIF_CAN2_bFDO 16 _b
...
FIF_CAN2_bFDO 31 _b
FIF_CAN2_nOut W2_a
FIF_C
A
N2_dnOu
t
D1_p
5, 6
FIF_CAN2_nOut W3_a
7, 8
FIF_CAN2_nOut W4_a
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_CAN2_dnOutD1_p , only the variable
FIF_CAN2_nOutW1_a or only the variables FIF_CAN2_bFDO0_b ... FIF_CAN2_bFDO15_b .
Show/Hide Bookmarks