Endress+Hauser Gammapilot M FMG60, Руководство по эксплуатации

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Gammapilot M FMG60 PROFIBUS PA Operation
Hauser 41
IEEE-754 Floating Point Number
The measured value is transmitted as an IEEE 754 floating point number, whereby
Measured value = (-1)
VZ
x 2
(E-127)
x (1+F)
Example:
Status codes
The status codes comprise one byte and have got the following meaning:
If a status other than "GOOD" is sent to the device, the display indicates an error.
Byte 1 Byte 2
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
VZ 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
Exponent (E) Mantissa (F)
Byte 3 Byte 4
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
2 -8 2 -9 2 -10 2 -11 2 -12 2 -13 2 -14 2 -15 2 -16 2 -17 2 -18 2 -19 2 -20 2 -21 2 -22 2 -23
Mantissa (F)
40 F0 00 00 (hex) = 0 100 0000 1 111 0000 0000 0000 0000 0000 (bin)
= (-1) 0 x 2 (129-127) x (1 + 2 -1 + 2 -2 + 2 -3 )
= 1 x 2
2
x (1 + 0.5 + 0.25 + 0.125)
= 1 x 4 x 1.875
= 7.5
Status-
Code Device status Meaning Main value Secondary value
0C Hex BAD device error X
0F Hex BAD device error X
1F Hex BAD out-of-service (target mode) X
40 Hex UNCERTAIN non-specific (simulation) X
47 Hex UNCERTAIN last usable value
(Fail-safe-Mode active) X
4B Hex UNCERTAIN Substitute set
(fail-safe mode active) X
4F Hex UNCERTAIN initial value
(fail-safe mode active)
X
5C Hex UNCERTAIN Configuration error
(limits not set correctly) X
80 Hex GOOD OK X X
84 Hex GOOD Active block alarm
(static revision counter incremented) X
89 Hex GOOD LOW_LIM (alarm active) X
8A Hex GOOD HI_LIM (alarm active) X
8D Hex GOOD LOW_LOW_LIM (alarm active) X
8E Hex GOOD HI_HI_LIM (alarm active) X