ProSoft Technology 3170-PDP - Manual (Page 39)

How Communication Takes Place and I/O Image Table Mapping 3170-PDP ♦ FLEX Platform
FLEX I/O™ PROFIBUS Adapter
ProSoft Technology, Inc. Page 39 of 152
August 23, 2007
Dec. Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Read Word 6 Channel 4 Input Data
Read Word 7 Channel 5 Input Data
Read Word 8 Channel 6 Input Data
Read Word 9 Channel 7 Input Data
Read Word
10
Overrange Bits Underrange Bits
Read Word
11 0 0 0 0 0 Bad
Cal
Cal
Done Cal
Range 0 Diagnostics Pwr
Up Bad
Structure CJC
over CJC
Under
1794-IT8 Write
Dec. Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Write Word 1 8-Bit Calibration Mask Cal
Clk Cal hi
Cal lo Filter Cutoff FDF Data Type
Write Word 2 Thermocouple 3 Type Thermocouple 2 Type Thermocouple 1 Type Thermocouple 0 Type
Write Word 3 Thermocouple 7 Type Thermocouple 6 Type Thermocouple 5 Type Thermocouple 4 Type
Where: FDF = fixed digital filter bit
1794-IT8 Word/Bit Descriptions
Word Decimal Bit
(Octal Bit)
Description
Read Word 1 00 to 15 (00 to 17) Reserved
Read Word 2 00 to 15 (00 to 17) Channel 0 Input data
Read Word 3 00 to 15 (00 to 17) Channel 1 Input data
Read Word 4 00 to 15 (00 to 17) Channel 2 Input data
Read Word 5 00 to 15 (00 to 17) Channel 3 Input data
Read Word 6 00 to 15 (00 to 17) Channel 4 Input data
Read Word 7 00 to 15 (00 to 17) Channel 5 Input data
Read Word 8 00 to 15 (00 to 17) Channel 6 Input data
Read Word 9 00 to 15 (00 to 17) Channel 7 Input data
Read Word 10 00 to 07 (00 to 07) Underrange bits – these bits are set if the input signal is below
the input channel's minimum range.
08 to 15 (10 to 17) Overrange bits – these bits are set if 1), the input signal is
above the input channel's maximum range, or 2), an open
detector is detected.
Read Word 11 00 (00) Cold Junction sensor underrange bit. – this bit is set if the cold
junction temperature is below 0°C.
01 (01) Cold Junction sensor overrange bit. – this bit is set if the cold
junction temperature is above 70°C.
02 (02) Bad Structure – this bit is set if there is an invalid
thermocouple type selected.