Lenze Drive PLC - Page 73

System bus (CAN) with Servo PLC & Drive PLC
System blocks
6.4 CAN3_IO
6-15
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 CAN3_bInB 0 _b
...
CAN3_bInB 15 _b
CAN3_nIn W1_a
C
A
N
3
d
n
I
n
D
1
p
3, 4 CAN3_bInB 16 _b
...
CAN3_bInB 31 _b
CAN3_nIn W2_a
C
A
N3_dnInD1
_
p
5, 6
CAN3_nIn W3_a
7, 8
CAN3_nIn W4_a
Tip!
Via code C0357/3 you can set the monitoring time for data receipt. (Default setting: 3000 ms)
• Additional information can be found in chapter 3.10.1. (^ 3-7)
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