Lenze DDS System bus CAN for PLC - Manual (Page 104)

7.4 CAN2_IO (node number: 32)
System bus (CAN) for Lenze PLC devices
CAN system blocks
7−16
L
PLC−Systembus EN 2.0
7.4.4 Assignment of the user data to variables
Several variables of different data types are assigned to the user data to be transmitted and received.
Thus, the data in the PLC program can be optionally interpreted as:
·
binary information (1 bit)
·
status word/quasi−analog value (16 bit)
·
angle information (32 bit)
Variables for user data to be transmitted
User data Assigned variables
Byte Bit Variable (1 bit) Variable (16 bit) Variable (32 bit)
1 0
...
7
CAN2_bFDO0_b
...
CAN2_bFDO7_b
CAN2_nOutW1_a
CAN2_dnOutD1_p
2 0
...
7
CAN2_bFDO8_b
...
CAN2_bFDO15_b
3 0
...
7
CAN2_bFDO16_b
...
CAN2_bFDO23_b
CAN2_nOutW2_a
4 0
...
7
CAN2_bFDO24_b
...
CAN2_bFDO31_b
5 0...7
CAN2_nOutW3_a
6 0...7
7 0...7
CAN2_nOutW4_a
8 0...7
Note!
Avoid simultaneous overwriting via different variable types to ensure data consistency.
For instance, if you want to write bytes 1 and 2, only use the variable CAN2_dnOutD1_p,
CAN2_nOutW2_a, or only the variables CAN2_bFDO0_b ... CAN2_bFDO15_b for this purpose!
Variables for received user data
User data Assigned variables
Byte Bit Variable (1 bit) Variable (16 bit) Variable (32 bit)
1 0
...
7
CAN2_bInB0_b
...
CAN2_bInB7_b
CAN2_nInW1_a
CAN2_dnInD1_p
2 0
...
7
CAN2_bInB8_b
...
CAN2_bInB15_b
3 0
...
7
CAN2_bInB16_b
...
CAN2_bInB23_b
CAN2_nInW2_a
4 0
...
7
CAN2_bInB24_b
...
CAN2_bInB31_b
5 0...7
CAN2_nInW3_a
6 0...7
7 0...7
CAN2_nInW4_a
8 0...7