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Technical Data
AddFEM
4-22
AddFEM
C79000–G8076–C900–03
Error Weighting Structure
Bit
Pos.
Signal
Meaning
7
ZRV
Forced reserve specification manual
Is set when operating mode switch = STOP
e.g. due to repairs.
6
BGF
Module fault
Grave fault. Hardware fault
e.g.: power failure, memory error, etc.
Restart of the AddFEM
5
ZTA
Central unit failure
Higher–level fault. E.g. central unit or PROFIBUS DP failure.
4
KF
Channel error
Lower–level or externally initiated channel fault. The number of channel
errors is supplied in the additional byte “Channel error weighting”.
3
RES
Reserve
2
RES
Reserve
1
RES
Reserve
0
MRV*
Master state specification request
The automation processor specifies the master state of the AddFEM as the
”higher–level referee”.
=1 –> Automation processor requests: AddFEM is reserve
=0 –> Automation processor requests: AddFEM is master
Legend: * Is not set in the error weighting via the PROFIBUS DP telegram
Floating–point Representation of the Counter Values in IEEE 754 Format (32 Bits =
4 Bytes):
Byte address
+3
+2
+1
+0
Meaning
SEEE EEEE
EMMM MMMM
MMMM MMMM
MMMM MMMM
Meaning of the individual bits:
S
Preceding sign bit
0: Positive / 1: Negative
E
Exponent
Two’s–complement representation with a fixed offset of 127
M
Mantissa 24 bits
The most significant bit is always 1 and is not represented. The least significant bit
of the exponent is displayed at the corresponding bit position.
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