Rockwell Automation 20-COMM-R Remote I/O Adapter - Manual (Page 67)

Using Block Transfer Messaging 5-9
20-COMM-R Remote Adapter I/O User Manual
Publication 20COMM-UM004D-EN-P
PLC-5 Controller Example Block Transfer Data Files for PLC-5 Example Program
The following set of data files shows a read of drive parameter 1 - [Output
Freq]. The value of parameter 1 is 213 (21.3 Hz).
Request Data (BTW) to Read Drive Parameter 1 (Hex)
Response Data (BTR) to Read Drive Parameter 1 (Hex)
The following set of data files shows a write of drive parameter 41 - [Motor
NP Volts]. The value written is 2300 (230.0V AC).
Request Data (BTW) to Write to Drive Parameter 41 (Hex)
Response Data (BTR) to Write to Drive Parameter 41 (Hex)
See Formatting Block Transfer Messages on page 5-2 for more information
on block transfer messages.
Address Value (hex) Description See Page
N12:0 000A Length of Message = 10 bytes (A hex) 5-3
N12:1 0081 Required Setting 5-3
N12:2 000E Service = Get_Attribute_Single C-1
N12:3 0093 Class = 93 DPI Parameter Object C-5
N12:4 0001 Instance = Parameter 1 (1 hex) C-5
N12:5 0009 Attribute = 09 DPI Parameter Value C-6
Address Value (hex) Description See Page
N13:0 0004 Length of Message = 4 bytes 5-4
N13:1 0000
The Message was Successful 5-4
N13:2 0000
N13:3 00D5 Response Data = 213 (D5 hex) = 21.3 Hz. n/a
Address Value (hex) Description See Page
N12:0 000C Length of Message = 12 bytes (C hex) 5-3
N12:1 0081 Required Setting 5-3
N12:2 0010 Service = Set_Attribute_Single C-1
N12:3 0093 Class = 93 DPI Parameter Object C-5
N12:4 0029 Instance = Parameter 41 (29 hex) C-5
N12:5 0009 Attribute = 09 DPI Parameter Value C-6
N12:6 08FC Data = 2300 (8FC hex) = 230.0V AC n/a
Address Value (hex) Description See Page
N13:0 0002 Length of Message = 2 bytes 5-4
N13:1 0000
The Message was Successful 5-4
N13:2 0000