ICP DAS USA ALM-04-MRTU, User Manual

Page: 25 / 26

ALM-04-MRTU User’s Manual
ALM-04-MRTU
User’s Manual (Rev1.0, Jan./2020) ------------- 25
4.4 ALM-04-MRTU Address Mapping
Modbus Address(MB Addr) Base: 0x00
Address MB Addr CH Descriptions Range(Byte) Type
00001 0 1 Digital Output 0=OFF, 1=ON R
✽
Length must always be 1.
Table 4-5: FC01 Read Coil address (0xxxx)
Address MB Addr CH Descriptions Range(Byte) Type
10001~
10004
0 ~ 3 1 ~ 4 Digital Input 0=OFF, 1=ON R
Table 4-6: FC02 Read Discrete Inputs address (1xxxx)
Address MB Addr CH Descriptions Range(INT16) Type
40001 0 - Volume Level 0 ~ 10 R
✽
Length must always be 1.
Table 4-7: FC03 Read multiple Output registers address (4xxxx)
Address MB Addr CH Descriptions Range(Byte) Type
00001 0 1 Relay Output 0x00=OFF, 0xFF=ON W
✽
Length must always be 1.
Table 4-8: FC05 Write single Coil address (0xxxx)
Address MB Addr CH Descriptions Range(INT16) Type
40001 0 - Volume Level 0 ~ 10 W
40002 1 - Play Back Alarm Index
0: Stop Playback
1~15: Alarm Index
W
Table 4-9: FC06 Write single Output registers address (4xxxx)