Lenze Drive PLC - Page 88

System bus (CAN) with Servo PLC & Drive PLC
System blocks
7.2 FIF_CAN2_IO
7-6
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 received are assigned to several variables of a different data
type at the same time and can therefore - as required - be evaluated as
• binary information (1-bit)
• quasi-analog value (16-bit)
• phase-angle information (32-bit)
in the PLC program:
Byte Variable (1-bit) Variable (16 -bit) Variable (32 -bit)
1, 2 FIF_CAN2_bInB 0 _b
...
FIF_CAN2_bInB 15 _b
FIF_CAN2_nInW1 _a
F
I
F
C
A
N
2
d
n
I
n
D
1
p
3, 4 FIF_CAN2_bInB 16 _b
...
FIF_CAN2_bInB 31 _b
FIF_CAN2_nInW2 _a
FIF_C
A
N2_dnInD1_p
5, 6
FIF_CAN2_nInW3 _a
7, 8
FIF_CAN2_nInW4 _a
Tip!
Via code C2457/2 you can set the monitoring time for data receipt. (Default setting: 3000 ms)
• Additional information can be found in chapter 5.10.1. (^ 5-8)
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