Error Check Using The Leds And Corrective Actions - Mitsubishi Electric Melsec Q Series User Manual

9
TROUBLESHOOTING

9.1 Error Check Using the LEDs and Corrective Actions

This section explains how to check errors by the LEDs or by checking the LED status on
GX Works2.
(1) Causes and actions
LED Status
RUN OFF
RSP ERR. ON
TOKEN OFF
PRM SET Flashing
FAULT ON
9
- 2 9.1 Error Check Using the LEDs and Corrective Actions
The following table summarizes causes that can be thought from the LED status of
the QJ71PB92V and corrective actions to be taken.
Table9.1 Causes and Actions
Cause
The watchdog monitoring time has been exceeded. Please consult your local Mitsubishi representative.
A communication error has occurred.
The token is not being rotated.
Parameters in the flash ROM are corrupted.
Parameters of the QJ71PB92D were written with
the QJ71PB92D-compatible function disabled.
Parameters of the QJ71PB92V were written with
the QJ71PB92D-compatible function enabled.
The FDL address of a DP-Slave is duplicated with
that of the DP-Master in parameter settings.
Parameters in the flash ROM are corrupted.
An unexpected error other than the above has
occurred.
* 1 Depending on the number of DP-Masters within the same network and the transmission speed
setting, the TOKEN LED seems to be unlit even in execution of token passing. (
Read the diagnostic information from the
Diagnostic information area (for mode 3)
(Un\G23072 to Un\G23321).
• Check the PROFIBUS cable connections.
(
• Check if the bus terminator is connected.
(
*1
• Check if the FDL address of each station is
unique. (
• Check if the FDL address does not exceed the
HSA. (
Initialize the QJ71PB92V (initialization of the flash
ROM) and write parameters again.
(
• Change the module selected in the GX
Configurator-DP project to QJ71PB92V, and
write the parameters.
• Check Switch 2 of the intelligent function module
switches. (
• Change the module selected in the GX
Configurator-DP project to QJ71PB92D, and
write the parameters.
• Check Switch 2 of the intelligent function module
switches. (
Check the parameters.
(
Initialize the QJ71PB92V (initialization of the flash
ROM) and write parameters again.
(
Please consult your local Mitsubishi representative.
Action
Section 5.5.1)
Section 5.5.1)
Section 6.3 and 6.5)
Section 6.4)
Section 9.6)
Section 6.7)
Section 6.7)
Section 6.3 and 6.5)
Section 9.6)
Section 5.3)