Library manual M238 system functions | 2 MB - BERGER - POSITEC

M238 System Variables
SERIAL_R[0..1]: Serial Line Read Only System Variables
Introduction
Variable Structure
SERIAL_R is an array of 2 SERIAL_R_STRUCT type. Each element of the array
returns diagnostic System Variables for the corresponding Serial Line.
For M238:
Serial_R[0] refers to the Serial Line 1
Serial_R[1] refers to the Serial Line 2 (only for TM238LFDC24DT• and
TM238LFAC24DR )
The following table describes the parameters of the SERIAL_R[0..1] System
Variables:
%MW Var Name Type Comment
Serial Line
n/a i_udiFramesTransmittedOK UDINT Number of frames successfully transmitted.
n/a i_udiFramesReceivedOK UDINT Number of frames received without any
detected errors.
n/a i_udiRX_MessagesError UDINT Number of frames received with detected
errors (checksum, parity).
Modbus Specific
n/a i_uiSlaveExceptionCount UINT Number of Modbus exception responses
returned by the Controller.
n/a i_udiSlaveMsgCount UINT Number of messages received from the Master
and addressed to the Controller.
n/a i_uiSlaveNoRespCount UINT Number of Modbus Broadcast requests
received by the Controller.
n/a i_uiSlaveNakCount UINT Not used
n/a i_uiSlaveBusyCount UINT Not used
n/a i_uiCharOverrunCount UINT Number of Character overrun.
NOTE: n/a means that there is no predefined %MW mapping for this System
Variable.
NOTE:
The SERIAL_R Counters are reset on:
Download.
Controller Reset.
SERIAL_W[x].q_wResetCounter command.
Reset command by Modbus request function code #8.
20 EIO0000000364 04/2012