Mitsubishi Electric RD77MS2 - Page 345

9 COMMON FUNCTIONS
9.11 Event History Function
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9
Detailed information of error/warning event
The items displayed in the detailed information, which vary depending on each error category, are configured by the items
shown in the table below.
*1 Output only at positioning control. Otherwise, "-" is output.
At the time other than the positioning control (during home position return or JOG operation, etc.), judge the timing of when an error
occurred by the axis operation status.
*2 For common parameters, an axis in which an event occurred is set to "Axis 1".
*3 For an error code which is independent of an axis, the information for an axis in which an event occurred is not displayed.
(For an error code which is independent of an axis, refer to the following.
Page 574 TROUBLESHOOTING)
*4 The following table shows the display of the start No., data No. in which an event occurred, block start point No. at start, and block start
point No. at occurrence.
Error category Detailed information 1 Detailed information 2 Detailed information 3
H/W error 
Positioning control in
common
Home position return
Absolute position restoration
Manual control
Positioning operation
Block start data
Positioning data
Speed-torque control
*3
Cam data operation
Axis information
• Axis in which an event occurred
• Axis operation status
• Start No.
*4
• Data No. in which an event occurred
*4
•Factor axis
• Block start Point No. at start
*4
• Block start Point No. at occurrence
*4
• Data by each error
Current value
• Feed current value
• Actual current value
• Feedrate
•Unit
Signal
• PLC READY
• All axis servo ON
•BUSY
• External input signal ([Md.30])
• Servo status 1
• Servo status 2
• Servo status 3
Synchronous control (Input
axis)
Axis information
• Axis in which an event occurred (For a
synchronous encoder axis, 800 + Axis No.)
• Axis operation status (For a synchronous
encoder axis, always 0)
• Data by each error

Synchronous control (Output
axis)
Axis information
• Axis in which an event occurred
• Axis operation status
• Cam data No. when an error occurred
• Data by each error
Current value
• Feed current value
•Unit

Servo amplifier Axis information
• Axis in which an event occurred
• Axis operation status
• Start No.
*1*4
• Data No. in which an event occurred
*1*4
• Block start Point No. at start
*4
• Block start Point No. at occurrence
*4
• Connected device
• Servo alarm
• Data by each error
Current value
• Feed current value
• Actual current value
•Unit
• Motor speed (0.01 r/min)
• Motor current value (0.1%)
Signal
• Servo status 1
• Servo status 2
• Servo status 3
I/F
• Hold error
• Flash ROM error
• CPU module error
System information
• Number of write accesses to flash ROM
• Data by each error

Parameter setting range
error
• Common parameter
• Basic parameter
• Detailed parameter
• Home position return
parameter
• Expansion parameter
• Servo parameter
Axis information
• Axis in which an event occurred
*2
• Data by each error
Setting value
• Parameter 1
• Setting value 1
• Parameter 2
• Setting value 2
• Parameter 3
• Setting value 3
Displays the number of parameters
in which an error occurred.
Setting value
• Parameter 4
• Setting value 4
• Parameter 5
• Setting value 5
• Parameter 6
• Setting value 6
Displays the number of parameters
in which an error occurred.