Ds 97 Read And Reset As-I Master Error Counters (Fw V1.1 And Higher); Ds 150 To Ds 153 Read As-I Error Counters - Siemens SIMATIC ET 200SP Manual

8.9.3

DS 97 Read and reset AS-i master error counters (FW V1.1 and higher)

Description
This data record functions in the same manner as the "DS 96 Read AS-i slave error
counters" data record. After the DS 97 data record is read, all error counters in the
AS-i master are reset to "0".
The structure of the DS 97 data record is identical to the structure of the DS 96 data record.
For an explanation of the error counter see Section "DS 96 Read AS-i master error counters
and status messages (FW V1.1 and higher) (Page 86)".
8.9.4

DS 150 to DS 153 Read AS-i error counters

These data records read the error counters of the AS-i slaves. Data records DS 150 and
DS 151 access the standard addresses and the A addresses. Data records DS 152 and
DS 153 access the B addresses. The counters for addresses 16 / 16A exist identically in
data records DS 150 and DS 151. The counters for address 16B exist identically in data
records DS 152 and DS 153.
Error counter
The CM AS-i Master ST module manages several counters internally which log the number
of master frames sent and the number of different error occurrences.
These counter values can be read out using data records DS 150 to DS 153:
● DS 150 contains counter values for slave addresses 1(A) to 16(A).
● DS 151 contains counter values for slave addresses 16(A) to 31(A).
● DS 152 contains counter values for slave addresses 1B to 16B
● DS 153 contains counter values for slave addresses 16B to 31B
Each data record also contains the total count of master frames sent. To determine a relative
error rate, divide the count of error occurrences by the number of master frames sent.
The bus system allows the automatic sending of repeat message frames. This ensures that
the process data is reliably transferred between master and slave in the industrial
environment, even in the case of brief interruptions in transmission, e.g. due to switching
operations. If the fault limit value is exceeded, or the slave is not functioning correctly due to
a defect, communication to the slave cannot be performed within the defined time period. In
this case, transmission of the process data is interrupted. The master signals failure of the
slave address and tries to establish communication again.
AS-Interface master CM AS-i Master ST (3RK7137-6SA00-0BC1)
Manual, 07/2017, A5E02655262020A/RS-AD/004
Alarms, faults and system events
8.9 Data records for diagnostics
89