Inovance H3U Series - Canlink Communication

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9 Communication9.6.1 Principle of CANlink3.0 Communication
Variable Head Address Number of Coils
M0 to M7679 0 (0) 7680
M8000 to M8511 0x1F40 (8512) 512
SM0 to SM1023 0x2400 (9216) 1024
S0 to S4095 0xE000 (57344) 4096
T0 to T511 0xF000 (61440) 512
C0 to C255 0xF400 (62464) 256
X0 to X377 0xF800 (63488) 256
Y0 to Y377 0xFC00 (64512) 256
5) Register address of a slave AC drive and precautions
For details about register addresses of slave AC drives, see Appendix B of the
MD500 Series General-
Purpose AC Drive User Manual
(visit www.inovance.cn to download the latest version), in which
parameter number addresses, state, start/stop control, frequency instructions, and alarms are dened.
Parameter numbers of AC drives are accessed through registers. The address of a parameter number
corresponds to the parameter number group number. Take FX-yy as an example: "X" is hexadecimal, and
"yy" is decimal. When calculating the register address, the system converts "yy" into hexadecimal "YY", so
the corresponding address is hexadecimal FXYY. The uppermost bits of the hexadecimal address of a U
parameter number are indicated by 7XYY, as listed in the following table.
Parameter
Number Group
Address to Be Read
(HEX)
Address to Be
Permanently Changed
(HEX)
Address to Be
Temporarily Changed
(HEX)
F0-00 to FE-29 F000 to FE1D F000 to FE1D 0000 to 0E1D
A0-00 to AC-27 A000 to AC1B A000 to AC1B 4000 to 4C1B
U0-00 to U0-65 7000 to 7041 Unchangeable Unchangeable
Parameter numbers of AC drives and servos are stored in internal ash drive, and can be retained
upon power failure. The ash drive does not limit the number of Read operations but limits that of Write
operations to 100,000. If the limit is exceeded, hardware may be damaged. Therefore, modify parameter
numbers of AC drives and servos in "triggered" mode rather than in "cyclic" mode.
For AC drive parameter numbers to be frequently modied, AC drives only allow addresses of parameter
numbers in random access memory (RAM) to be modied. In this way, the PLC will temporarily modify
parameter numbers in RAM, which is valid for AC drives and will not trigger modication of the ash drive.
9.6 CANlink Communication
H3U PLCs support CAN communication. The main PLC module supports CANlink and CANopen networks. You
can switch from one protocol to another through M8280. When M8280 = OFF, CANlink3.0 is enabled; when
M8280 = ON, CANopen is enabled. To switch from one protocol to another, you need to power off then on the PLC
or switch it from STOP to RUN.
9.6.1 Principle of CANlink3.0 Communication
CANlink3.0 communication is implemented through CAN conguration rather than CAN communication
instructions. When downloading user programs, you need to download CAN congurations to the PLC.
Understanding the principle of CANlink3.0 network conguration can help you complete the CAN
conguration table.
On a CANlink3.0 network, one master station must exist, which can be an H3U, H2u-XP, or H1u-XP PLC.