MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 100)

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MELSEC-Q
5 DATA USED FOR POSITIONING CONTROL
5.1.7 Types and roles of monitor data
The monitor data area in the buffer memory stores data relating to the operating state
of the positioning system, which are monitored as required while the positioning
system is operating.
The following data are available for monitoring.
•
System monitoring:
Monitoring of the QD75 configuration and operation history (through the system
monitor data Md.1 through Md.19 )
•
Axis operation monitoring:
Monitoring of the current position and speed, and other data related to the
movements of axes (through the axis monitor data Md.20 through Md.48 )
The axis monitor data are refreshed every 1.8 ms. Note that " Md.21 Machine
feed value", " Md.22 Feedrate", " Md.28 Axis feedrate" and " Md.30 External
input/output signal" are refreshed every 56.8ms. Also, " Md.23 Valid M code", is
updated when the "M code ON signal [X4, X5, X6, X7]" turns ON.
[1] Monitoring the system
Monitoring the positioning system operation history
Monitoring details Corresponding item
Whether the system is in the test mode or not Md.1 In test mode flag
Start information Md.3 Start information
Start No. Md.4 Start No.
Hour Md.5 Start (Hour)
Start
Minute:second Md.6 Start (Minute:second)
Error upon starting Md.7 Error judgment
History of data that
started an operation
Latest pointer No. Md.8 Start history pointer
Axis in which the error occurred Md.9 Axis in which the error occurred
Axis error No. Md.10 Axis error No.
Hour Md.11 Axis error occurrence Hour
Axis error occurrence
Minute:second Md.12 Axis error occurrence Minute:second
History of all errors
Latest pointer No. Md.13 Error history pointer
Axis in which the warning occurred Md.14 Axis in which the warning occurred
Axis warning No. Md.15 Axis warning No.
Hour Md.16 Axis warning occurrence (Hour)
Axis warning
occurrence
Minute:second Md.17 Axis warning occurrence (Minute:second)
History of all warnings
Latest pointer No. Md.18 Warning history pointer
Number of write accesses
to the flash ROM after the
power is switched ON
Number of write accesses to flash ROM Md.19 No. of write accesses to flash ROM