Rockwell Automation 20-COMM-M Modbus/TCP Adapter - Manual (Page 47)

Using Modbus/TCP Function Codes 4-11
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Reading Device Parameters
1. Verify that the Unit Identifier is set to “0” (zero) or “16.”
2. Using Table 4.J and its associated formula, determine the value to use
for an adapter Indirect Par #x that points to the specific device
parameter you want to read. For example, suppose adapter Parameter
38 - [Indirect Par #1] is used and you want to read drive Parameter 003
- [Output Current] or drive Parameter 012 - [DC Bus Voltage]. In this
case, set adapter Parameter 38 - [Indirect Par #1] to a value of “3” or
“12” respectively.
3. Use Function Code 03 or 23 ( Table 4.A ) to read the value(s) of specific
device parameter(s). For this example, read register addresses 10041
and 10042 for adapter Indirect Parameter #1 Data as shown in
Table 4.K .
Table 4.K Register Addresses for Indirect Parameter Data
Register
Address Description Detail
10041 Indirect Parameter #1 Data Lo Word
10042 Hi Word
10043 Indirect Parameter #2 Data Lo Word
10044 Hi Word
10045 Indirect Parameter #3 Data Lo Word
10046 Hi Word
10047 Indirect Parameter #4 Data Lo Word
10048 Hi Word
10049 Indirect Parameter #5 Data Lo Word
10050 Hi Word
10051 Indirect Parameter #6 Data Lo Word
10052 Hi Word
10053 Indirect Parameter #7 Data Lo Word
10054 Hi Word
10055 Indirect Parameter #8 Data Lo Word
10056 Hi Word
10057 Indirect Parameter #9 Data Lo Word
10058 Hi Word
10059 Indirect Parameter #10 Data Lo Word
10060 Hi Word
10061 Indirect Parameter #11 Data Lo Word
10062 Hi Word
10063 Indirect Parameter #12 Data Lo Word
10064 Hi Word
10065 Indirect Parameter #13 Data Lo Word
10066 Hi Word
10067 Indirect Parameter #14 Data Lo Word
10068 Hi Word
10069 Indirect Parameter #15 Data Lo Word
10070 Hi Word
10071 Indirect Parameter #16 Data Lo Word
10072 Hi Word