Mitsubishi Electric QS001CPU User Manual page 120

12
TROUBLESHOOTING
(2) Flowchart for when "CONTROL-BUS ERROR" occurs
The "CONTROL-BUS ERROR" has occurred.
Check the slot or base unit where
the error detected by GX
Developer.
Hardware error
Please consult your local Mitsubishi
representative, explaining a detailed
description of the problem.
12
- 13 12.2 Troubleshooting Flowchart
12.2.7 Flowchart for when the "ERR." LED turns on or flashes
This flowchart can be confirmed only when a specific slot/base unit can be detected
by the error code.
Is the module
on the corresponding
slot mounted properly?
YES
Has noise in
excess of the specified value
been generated?
NO
Replace the
corresponding module.
Error detection
Replace the CPU
module.
Error detection
Replace the base unit.
Error detection
Figure 12.5 Flowchart for when the "ERR." LED is on/flashing
NO
Mount the module properly.
Has the "ERR."
LED turned off?
YES
Mount the module properly.
Normal operation
Normal operation
Normal operation
YES
NO
Completed