Agilent Technologies TwisTorr 305 FS User Manual page 176

8 Technical Information
Profibus Option
OFFSET SIZE
UNIT RES
BYTE BYTE
17 2 -
19 2 min
21 2 h
23 4 mBar/
Torr/Pa
Diagnostic Management
In addition to the ProfiBus six byte standard diagnostic, the interface
provides both user diagnostic and static diagnostics functions.
The standard diagnostic management is fully compliant with the ProfiBus
specification.
During the start-up phase after power on, the first byte in the user
diagnostic area, can assume values different from zero.
This byte has the following meaning:
▪
▪
▪
So, if the first byte is equal to 0, the interface is working properly,
otherwise there is a problem.
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RANGE DESCRIPTION
0-65536 Cycle Number
Number of cycles (start and stop) done by the pump
0-65536 Last Cycle Time
How long the last cycle lasted
0-65536 Pump Life
Total pump running time
- Pressure Reading
Reports the pressure reading in the "pressure unit"
selected by Par. Buff., Offset-20, B
Bit 0 = 1: controller not responds (RS485 link broken)
Bit 1 = 1: controller not identified (not compatible with the ProfiBus
gateway)
Bit 2 = 1: first loop of requests not ended (values in the input data are
not fully coherent yet)
TwisTorr 305 FS Remote Controller User Manual / 87-901-059-01
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