System Manual

System diagnostics
10.2 Diagnostics functions - STEP 7
SIMATIC RF300
System Manual, 07/2017, C79000-G8976-C345-07
419
Attributes "0x86" (mode 06), corresponds to UDT 280
Table 10- 5 Error counter
Name
Type
Possible Values
(hexadecimal)
Comment
FZP
byte 00 ... FF
= Error counter, passive (errors during idle time)
ABZ = Abort counter
CFZ
= Code error counter
SFZ
= Signature error counter
CRCFZ
= CRC error counter
BSTAT
= Current command status
ASMFZ
= Interface problems to host (CM/PC) parity, BCC, frame error
Note
Counter values are deleted.
Note that the counter values are deleted after they have been read out (command "Reader
status" or "SLG
-STATUS").
Explanations:
● "FZP": counts interference pulses when communication with a transponder is not taking
place (e.g. electromagnetic interference caused by contactors, motors, etc.). Counter
values can, however, also be generated when a transponder is located at the edge of the
field even when there is no external interference.
● "ABZ", "CFZ", "SFZ" and "CRCFZ" are counters for protocol errors which may occur
during reader-transponder communication. This can be caused by unsuitable
reader/transponder positioning (e.g. transponder on field boundary, several transponders
in the antenna field) or external EMC interference.
To ensure clear diagnostics of the quality of communication, it is recommended that a
"Reader status" (SLG STATUS) command with attribute "0x86" (mode 06) is executed
following receipt of the presence message to reset the error counters.
The protocol error counters are not mutually independent. If a code error (CFZ) occurs, this
will cause a signature (SFZ) or CRC- (CRCFZ) error.
● "BSTAT" is the status for the most recently executed command. A value other than 0
means that the previous command was repeated by the reader due to faults (see above).
● "ASMFZ" signals line-conducted communication interference between the
communications module and the reader. Faults of this type can be caused by contact
problems on the connector or the cable connection.