
PLX51-HART-4I / PLX51-HART-4O
♦
HART Input/Output
Diagnostics
Multidrop Field Devices
User Manual
ProSoft Technology, Inc.
Page 103 of 127
Table 5.7 – Modbus statistics
Statistic
Description
Tx Packet Count
The number of Modbus packets sent by the module.
Rx Packet Count
The number of Modbus packets received by the module.
Checksum errors
The number of corrupted Modbus packets received by the module.
Parity errors
The number of bytes with parity errors received by the module.
Timeout Errors
The number of message response timeouts the module has
encountered.
Data Too Large
The number of Modbus requests or responses where the data was
too large to process.
Register Not Valid
A request was received for a register which is not defined.
Node Mismatch
The received Modbus request did not match the module’s Modbus
node address.
Data Alignment Errors
The Modbus request and associated mapped item is not byte
aligned with the destination.
Illegal Function
The number of times the Modbus device responded with an Illegal
Function exception.
Illegal Data Address
The number of times the Modbus device responded with an Illegal
Data Address exception.
Illegal Data Value
The number of times the Modbus device responded with an Illegal
Data Value exception.
Slave Device Failure
The number of times the Modbus device responded with a Device
Failure exception.
Acknowledge –Response
Delay
The number of times the Modbus device responded with an
Acknowledge exception.
Slave Device Busy
The number of times the Modbus device responded with a Slave
Busy exception.
Negative Acknowledge
The number of times the Modbus device responded with a
Negative Acknowledge exception.
Memory Parity Error
The number of times the Modbus device responded with a Memory
Parity exception.
5.2.6 PCCC
The PCCC Statistics will be displayed if the PCCC protocol has been configured.