Rockwell Automation 20-COMM-D DeviceNet Adapter Series B FRN 2.xxx - Manual (Page 209)

DeviceNet Objects C-15
20-COMM-D DeviceNet Adapter User Manual
Publication 20COMM-UM002G-EN-P
Descriptor Attributes
Bit Name Description
0 Data Type (Bit 1) Right bit is least significant bit (0).
000 = BYTE used as an array of Boolean
001 = WORD used as an array of Boolean
010 = BYTE (8-bit integer)
011 = WORD (16-bit integer)
100 = DWORD (32-bit integer)
101 = TCHAR (8-bit (not unicode) or 16-bits (unicode)
110 = REAL (32-bit floating point value)
111 = Use bits 16, 17, 18
1 Data Type (Bit 2)
2 Data Type (Bit 3)
3 Sign Type 0 = Unsigned
1 = Signed
4 Hidden 0 = Visible
1 = Hidden
5 Not a Link Sink 0 = Parameter can sink a link
1 = Parameter cannot sink a link
6 Not Recallable 0 = Recallable from NVS
1 = Not Recallable from NVS
7 ENUM 0 = No ENUM text
1 = ENUM text
8 Writable 0 = Read only
1 = Read/write
9 Not Writable When Enabled 0 = Writable when enabled (for example, drive running)
1 = Not writable when enabled
10 Instance 0 = Parameter value is not a Reference to another parameter
1 = Parameter value refers to another parameter
11 Reserved Must be zero
12 Decimal Place (Bit 0) Number of digits to the right of the decimal point.
0000 = 0
1111 = 15
13 Decimal Place (Bit 1)
14 Decimal Place (Bit 2)
15 Decimal Place (Bit 3)
16 Extended Data Type (Bit 1) Right bit is least significant bit (16).
000 = Reserved
001 = DWORD used as an array of Boolean
010 = Reserved
011 = Reserved
100 = Reserved
101 = Reserved
110 = Reserved
111 = Reserved
17 Extended Data Type (Bit 2)
18 Extended Data Type (Bit 3)
19 Parameter Exists Used to mark parameters that are not available to network tools.
20 Not Used Reserved
21 Formula Links Indicates the Formula Data is derived from other parameters.
22 Access Level (Bit 1) A 3-bit field used to control access to parameter data.
23 Access Level (Bit 2)
24 Access Level (Bit 3)
25 Writable ENUM ENUM text: 0 = Read Only, 1 = Read/Write
26 Not a Link Source 0 = Parameter can be a source for a link
1 = Parameter cannot be a source for a link
27 Enhanced Bit ENUM Parameter supports enhanced bit ENUMs.
28 Enhanced ENUM Parameter supports enhanced ENUMs.
29 Not Used Reserved
30 Not Used Reserved
31 Not Used Reserved