
6 Communication settings and guide of HMI connecting with controller
Modbus RTU
Device Bit Address Word Address Format Notes
Output Relay
0X1-65535
------ DDDDD
Input Relay (read only)
1X1-65535
------ DDDDD
Input Register (read only) ------ 3X1-65535 DDDDD
Output Register ------ 4X1-65535 DDDDD
Modbus RTU Extend
Device Bit Address Word Address Format Notes
Output Relay
0X1-65535
------ DDDDD
Input Relay (read only)
1X1-65535
------ DDDDD
Input Relay (read only) 3X_bit1-65535 ------ DDDDD
Output Relay 4X_bit1-65535 ------ DDDDD
Input Register (read only) ------ 3X1-65535 DDDDD
Output Register ------ 4X1-65535 DDDDD
4x byte swap ------ 5X1-65535 DDDDD
4x single word write ------ 6X1-65535 DDDDD
4x double word swap 4X-DINV 1-65535 DDDDD
3x double word swap 3X-DINV 1-65535 DDDDD
Note: 5X is the byte counter; 4X-DINV, 3X-DINV is the word high and low-bit counter.
Modbus RTU Slave
Device Bit Address Word Address Format Notes
Output Relay LB 0-9999 ------ DDDDD Mapping to 0x 1~9999
Data Register ------ LW 0-65535 DDDDD Mapping to 4x 1~9999
Modbus RTU MT500 compatible
Device Bit Address Word Address Format Notes
Output Relay 0X 1-65535 ------ DDDDD
Input Relay (read only) 1X 1-65535 ------ DDDDD
Input Register (read only) ------ 3X 1-65535 DDDDD
Output Register ------ 4X 1-65535 DDDDD
Modbus ASCII
Device Bit Address Word Address Format Notes
Output Relay
0X1-65535
------ DDDDD
Input Relay (read only)
1X1-65535
------ DDDDD
Input Register (read only) ------ 3X1-65535 DDDDD
Output Register ------ 4X1-65535 DDDDD
Modbus TCP Slave
Device Bit Address Word Address Format Notes
Output Relay
0X 1-65535
------ DDDDD
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