States of the Memory Dump Function
The state of the memory dump function is reflected in the memory dump status. The engineering tool allows the memory
dump status to be checked. (GX Works3 Operating Manual)
Memory dump status
The following table lists the memory dump status.
Memory dump status
Trigger-wait not collected
Collecting after trigger
Sizes of Files Used for the Memory Dump Function
This section shows the sizes of files used for the memory dump function.
Capacity of the memory dump setting file
The capacity of the memory dump setting file varies depending on the length of the save file name. The following formula is
used for the calculation:
• Capacity of memory dump setting file = (((Number of characters of save file name
*1 Except for the period and extension.
*2 The remainder is discarded.
Capacity of the memory dump file
The capacity of the memory dump file is given by the total of the following items:
• Capacity of memory dump file = Volume of header + Volume of device data
Volume of header
The volume of header is given by:
• Volume of header = 1088 bytes (fixed)
Volume of device data
The volume of device data is given by the total of the following items. Note that this data is always created in the memory
dump file regardless of the settings of CPU parameters.
• Volume of device data = 520 bytes (fixed) + Volume of collected device data
■Volume of collected device data
The volume of collected device data is given by the following:
• Volume of collected device data = (Total number of points of bit devices ÷ 8) + (Total number of points of word devices × 2)
+ (Total number of points of word devices × 4)
State in which memory dump is not registered
A state in which data is not yet collected and establishment of the trigger condition is being waited
A state in which collection of the data after trigger is in progress (includes a state in which collected data is being
saved in the target memory)
A state in which collection of a specified data is completed
A state in which a memory dump error occurs and memory dump fails
× 2 bytes + 1201 bytes (fixed)) + 3) ÷ 4)
20 MEMORY DUMP FUNCTION
20.6 States of the Memory Dump Function