Rockwell-automation 20-COMM-R Remote I/O Adapter Uživatelský manuál stáhnout pdf (Strana 69)

Using Block Transfer Messaging 5-11

20-COMM-R Remote Adapter I/O User Manual

Publication 20COMM-UM004D-EN-P

SLC 500 Controller

Examples

Examples in this section are provided for SLC 500 Series C controllers with

firmware revision 3.xx and higher, and for SLC 500 controllers all versions.

Block Transfer Data Files for Example Program—Series C Controller

with Firmware Revision 3.xx and Higher

In a series C, firmware revision 3.xx and higher SLC processor, Block

Transfer Read (BTR) and Block Transfer Write (BTW) instructions can be

used. When the length of the Block Transfer is 20 words or higher, the

20-COMM-R adapter knows the Block Transfer is for explicit messages and

not for I/O Block Transfer (Chapter 4). Block Transfer setup is the same for

a 1/4 rack or 1/2 rack configuration. This example is for Rack 1, Group 4

(the upper half rack).

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 and Control Data to Read Drive Parameter 1 (Hex)

Response and Control Data 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 and Control Data to Write to Drive Parameter 41 (Hex)

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

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 127 128

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