ProSoft Technology inRAx 3170-PDP, Руководство пользователя

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How Communication Takes Place and I/O Image Table Mapping 3170-PDP ♦ FLEX Platform
FLEX I/O™ PROFIBUS Adapter
ProSoft Technology, Inc. Page 29 of 152
August 23, 2007
1794-IE8 Range Selection Bits
Channel
No. Channel
0 Channel
1 Channel
2 Channel
3 Channel
4 Channel
5 Channel
6 Channel
7
F0 C0 F1 C1 F2 C2 F3 C3 F4 C4 F5 C5 F6 C6 F7 C7
Decimal Bit 00 08 01 09 02 10 03 11 04 12 05 13 06 14 07 15
0 to 10V dc/0
to 20mA 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
4 to 20mA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
–10 to +10V
dc 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Do Not Use1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
C = Configure select bit
F = Full range bit
1 Do not use this configuration. Individual channels revert to 4 to 20mA if bit selection is all zeroes.
1794-IE8 Word/Bit Descriptions
Word Decimal Bit Definition
Read Word 1 Bits 00 to 14 Channel 0 analog data – 12-bit left justified two's
complement number; unused lower bits are zero; 4 to 20mA
uses all 16 bits.
Bits 15 Channel 0 analog data sign bit.
Read Word 2 Bits 00 to 14 Channel 1 analog data – 12-bit left justified two's
complement number; unused lower bits are zero; 4 to 20mA
uses all 16 bits.
Bits 15 Channel 1 analog data sign bit.
Read Word 3 Bits 00 to 14 Channel 2 analog data – 12-bit left justified two's
complement number; unused lower bits are zero; 4 to 20mA
uses all 16 bits.
Bits 15 Channel 2 analog data sign bit.
Read Word 4 Bits 00 to 14
Channel 3 analog data – 12-bit left justified two's
complement number; unused lower bits are zero; 4 to 20mA
uses all 16 bits.
Bits 15 Channel 3 analog data sign bit.
Read Word 5 Bits 00 to 14 Channel 4 analog data – 12-bit left justified two's
complement number; unused lower bits are zero; 4 to 20mA
uses all 16 bits.
Bits 15 Channel 4 analog data sign bit.
Read Word 6 Bits 00 to 14 Channel 5 analog data – 12-bit left justified two's
complement number; unused lower bits are zero; 4 to 20mA
uses all 16 bits.
Bits 15 Channel 5 analog data sign bit.
Read Word 7 Bits 00 to 14 Channel 6 analog data – 12-bit left justified two's
complement number; unused lower bits are zero; 4 to 20mA
uses all 16 bits.
Bits 15 Channel 6 analog data sign bit.