655
9
9 Communication 9.8.4 Special Ethernet Soft Elements
Register addressing
Variable Head address Number of registers
D0-D8511 0 (0) 8512
SD0-SD1023 0x2400 (9216) 1024
R0-R32767 0x3000 (12288) 32768
T0-T511 0xF000 (61440) 512
C0-C199 0xF400 (62464) 200
C200-C255 0xF700 (63232) 56 (32-bit)
9.8.4 Special Ethernet Soft Elements
Element Function Element Function
SM364
Flag of busy Ethernet, which cannot be
automatically reset
SD364 Listening port of an Ethernet slave station
SM365
Flag of ofine state, which can be automatically
reset based on the online state of the slave
station
0: No slave station is ofine. 1: One or more
slave stations are ofine.
SD365
Ofine station number (the fourth segment of the
IP address), which can be displayed when SM365
is set.
SM366
Flag of Ethernet enabling/disabling
0: The Ethernet is enabled. 1: The Ethernet is
disabled.
SD366 Error number (conguration table number)
SM367 Reserved SD367
Modbus TCP error code (upper eight bits indicate
the command, and lower eight bits indicate the
error code)
SM368 Reserved SD368 Reserved
SM369 Reserved SD369 Timeout (in the unit of 10 ms), 20 by default
SM370 Reserved SD370 IP address 1
SM371 Reserved SD371 IP address 2
SM372 Reserved SD372 IP address 3
SM373 Reserved SD373 IP address 4
SM374 Reserved SD374 MAC address 1
SM375 Reserved SD375 MAC address 2
SM376 Reserved SD376 MAC address 3
SM377 Reserved SD377 MAC address 4
SM378 Reserved SD378 MAC address 5
SM379 Reserved SD379 MAC address 6
IP and MAC addresses are stored in read-only SD elements.
9.8.5 Detecting H3U PLC Connection Faults
● Whether the network connection is normal
Unstable network connection may be caused by interference or poor contact. Use a shielded network cable
to make a new RJ45 connector. (You can use a
ping
command of the computer to preliminarily check the
network state.)
● To check whether the IP address is correctly congured, display SD370 to SD373.