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2103 Modem Module
Section 5 Modbus Protocol
5-7
The register definitions for the individual modules (Modbus
ASCII addresses 2-(N+1)) are in Table 5-1 below:
Table 5-2 Modbus ASCII Address 2-(N+1) Register Definitions
Register Number(s) Name Data Type Units Read/Write
1-4 Model number 8-byte string None Read
5-23 Module name 38-byte string None Read
24
1
Identify module 16 bit integer None Read/Write
25
2
Take reading flag 16 bit integer None Read/Write
26
3
Update interval 16 bit integer Seconds Read/Write
27
4
Active flag 1 16 bit field None Read
28 Active flag 2 16 bit field None Read
29 Active flag 3 16 bit field None Read
30 Active flag 4 16 bit field None Read
40,41 Level 4-byte float Meters Read
42 Level status code
5
16-bit integer Read
43-52 Level time record Time
6
Read
55,56 Velocity 4-byte float Meters/second Read
57 Velocity status code 16-bit integer Read
58-63 Velocity time record Time Read
70,71 Flow 4-byte float Cubic Meters/sec Read
72 Flow status code 16-bit integer Read
73-78 Flow time record Time Read
85,86 Flow 1 4-byte float Cubic Meters/sec Read
87 Flow 1 status code 16-bit integer Read
88-93 Flow 1 time record Time Read
100,101 Volume 4-byte float Cubic Meters Read
102 Volume status code 16-bit integer Read
103-108 Volume time record Time Read
115,116 Volume 1 4-byte float Cubic Meters Read