Mitsubishi Electric MELSEC-A Series User Manual page 91

7
TROUBLESHOOTING
(2) Troubleshooting when the master station's ERR. LED flashes
The following explains how to troubleshoot the system when the master station's
ERR. LED flashes.
(a) Master station side troubleshooting
ERR. LED flashes on master station.
Parameter settings match
system configuration?
Yes
Is any of master station link
special registers, SW0080 to SW0083
(Other station data link
status) ON?
Yes
Is any of master station link
special registers, SW0098 to SW009B
(Station No. overlap
status) ON?
Yes
Identify which bit is ON in SW0098 to
SW009B, and check corresponding module.
(2)(b) Slave station side
troubleshooting (When link special
register (SW0098 to SW009B)
turned ON) in this section
Figure 7.1 Troubleshooting when the master station's ERR. LED flashes
(b) Slave station side troubleshooting (When link special register (SW0098 to
Identify which bit is ON in SW0098 to SW009B,
and check corresponding module.
The module may be faulty. Please consult your
local Mitsubishi representative, explaining a
detailed description of the problem.
Figure 7.2 When link special register (SW0098 to SW009B) turned ON
No
Correct parameter settings or actual
system configuration.
No
Master station may be faulty. Please consult your
local Mitsubishi representative, explaining a
detailed description of the problem.
No
Identify which bit is ON in SW0080 to
SW0083, and check corresponding module.
(2)(c) Slave station side
troubleshooting (When link special
register (SW0080 to SW0083) turned
ON) in this section
SW009B) turned ON)
No
Are Station No. setting
switches correctly set?
Yes
7.1 Troubleshooting When Using the MELSOFT Connection Function
Correct setting of Station No. setting switches.
Reapply power to or reset slave station.
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