Acquisition Of Diagnostic And/Or Extended Diagnostic Information - Mitsubishi Electric Melsec Q Series User Manual

4
FUNCTIONS

4.1.2 Acquisition of diagnostic and/or extended diagnostic information

Diagnostic and/or extended diagnostic information of an error occurred on DP-Slaves
during I/O data exchange can be easily acquired using buffer memory and I/O signals.
The cause of errors occurring on DP-Slaves can be checked on the QJ71PB92V from the
diagnostic and/or extended diagnostic information.
(1) Procedure for acquiring diagnostic and/or extended diagnostic
information
The following shows the procedure for acquiring diagnostic and/or extended
diagnostic information.
DP-Master (Class 1)
Power
QJ71
QCPU
supply
PB92V
module
DP-Slave DP-Slave
Figure 4.3 Acquisition of Diagnostic and/or Extended Diagnostic Information
Generation of diagnostic information
The RSP ERR. LED turns ON.
The diagnostic information detection
signal (X01) turns ON.
Check the station that sent the diagnostic
information.
The diagnostic information sent from the
DP-Slave is read from the QJ71PB92V buffer
memory.
Is extended diagnostic
information stored in the DP-Slave?
(Checking method:
This section(4)(a))
Yes
The extended diagnostic information is read
from the DP-Slave.
Check the cause of the error from the
diagnostic and/or extended diagnostic
information, and take corrective actions.
Figure 4.4 Acquisition of Diagnostic and/or Extended Diagnostic Information
4.1 PROFIBUS-DPV0 Functions
4.1.2 Acquisition of diagnostic and/or extended diagnostic information
The DP-Slave notifies the QJ71PB92V of the diagnostic
information and extended diagnostic information.
DP-Slave
Diagnostic error
occurred
Extended diagnostic
error occurred
This section(2)
This section(3)
No
This section(4)
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