Detcon 700 Series Remote Sensor/Alarm Relay Module With Profibus DP Interface User Manual
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700 Profi-RAM
The PROFIBUS-DP Protocol is implemented using the HMS Industrial Networks, Inc. AnyBus-IC for
PROFIBUS. The Profibus National Organization (PNO) Identifier for this IC is 0x1810. The AnyBus-IC
GSD file and bitmaps must be downloaded from the HMS Industrial Networks, Inc website at
. The GSD file is used to configure the Profibus Master to recognize the Profi-RAM.
The Profi-RAM implements the following function of the AnyBus IC:
INPUT: 16 Byte (8 word).
All data is in 16 bit integer format. The following shows the data contents of these 8 words.
Word 1: Gas Type.
This is implemented on the Model 700 IR sensor only.
1= LEL CH4
2= LEL Heavy Hydrocarbons
3=
CO2
Word 2: Detectable Range.
Minimum value: 1
Maximum value: 10000
i.e.: 100 for 0-100 ppm H2S, 50 for 0-50% LEL.
Word 3: Current Gas Reading.
Minimum value: -10% of Detectable Range
Maximum value: 10000
This is the gas level currently being detected. This number should be divided by the value in word 8
to give an accurate reading.
Word 4: Auto Span Level.
Minimum value: 1% of Detectable Range
Maximum value: 95% of Detectable Range
This number is the gas concentration expected to be used during an auto span calibration. This number
should be divided by the value in word 8 to give an accurate number.
Word 5: Sensor Life.
Minimum value: 25%
Maximum value: 100%
This is an estimated remaining use of the plug-in sensor.
Word 6: Fault Codes.
Bit 15: Comm Fault between the Profi-RAM and the Model 700 Sensor.
Bits 14 thru 8 are Sensor dependant. See the Modbus section of the appropriate Model 700 instruction
manual for the designation of these bits.
Bit 7: Sensor Fault.
Bit 6: Processor Fault.
Bit 5: Memory Fault.
Bit 4: Input Voltage Fault.
Bit 3: 4-20ma Fault.
Bit 2: Temperature Fault.
Bit 1: Auto Span Fault.
Bit 0: Global Fault bit.
Profibus RAM I.M.
Rev. 0.3
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