FieldServer FS-8700-80 - Manual (Page 34)

McQuay Micro Tech Open Protocol Driver Manual Page 34 of 43
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Appendix C.2. Statistics
The driver reports statistics according to the standard FieldServer communication statistics listed in the following
table:
Statistic Description
NAK Each time a negative acknowledgement message is received.
CHECKSUM Each time that a message is received that contains a non-ASCII character.
NOISE
An acknowledgement message contains an unrecognized code.
NO START Each time a message is received that doesn’t begin with a space.
PROTOCOL All other errors are reported as protocol errors
Specific driver statistics can also be exposed by writing data to a Data Array called . "McQuay-stats”. A special Map
Descriptor is required.
The following data is stored. The location in the Data Array is obtained by multiplying the port number by 50 and
then using the location offset indicated in the table below.
Location Statistic
0 MCQ_STAT_PASSWORD
10 MCQ_STAT_NAK
11 MCQ_STAT_NOISE
12 MCQ_STAT_NOISE_CODE
13 MCQ_STAT_NON_ASCII_CHARS
14 MCQ_STAT_BAD_START_BYTE
15 MCQ_STAT_OTHER_CMPLT_ERR
16 MCQ_STAT_CLIENT_BYTES_RCVD
Location Statistic
17 MCQ_STAT_CLIENT_FRAGS_RCVD
18 MCQ_STAT_CLIENT_MSGSS_RCVD
19 MCQ_STAT_CLIENT_BYTES_SENT
20 MCQ_STAT_CLIENT_FRAGS_SENT
21 MCQ_STAT_CLIENT_MSGSS_SENT
22 MCQ_STAT_SERVER_BYTES_SENT
23 MCQ_STAT_SERVER_MSGSS_SENT
24 MCQ_STAT_SERVER_NAKS_SENT
The following example shows the configuration of this Map Descriptor. This section of text may be copoied directly
into the CSV file.
Nodes
Node_Name , Station , Port , Protocol , PLC_Type
Mcq_stats , 0 , P1 , McQuay , 200CFC
Data_Arrays
Data_Array_Name , Data_Format , Data_Array_Length
DA_MCQ_STATS , UINT32 , 2000
Map_Descriptors
Map_Descriptor_Name , Data_Array_Name , Data_Array_Offset , Function , Node_Name , Address , Length
McQuay-Stats
, DA_MCQ_STATS , 0 , Passive , Mcq_stats , 1 , 2000
The Data Array DA_MCQ_STATS (in this example) is used to store driver specific statistics. Only one of these Map
Descriptors may be specified per FieldServer.