Mitsubishi Electric MELSEC iQ-R Series User Manual page 160

Drive information
The following table lists the special register areas relating to the drive information.
No. Name
SD620 Data memory (drive 4) usage
status
SD622 Data memory (drive 4)
capacity
SD623
SD633 Data memory write (transfer)
status
SD634 Index for the number of data
memory write operations
SD635
*1 "100" is stored when powering off and on or reset the remote head module. (Since the event history will be stored and data will be
written into the data memory at the timing of powering off and on and resetting the remote head module, "100" is stored.)
APPX
158
Appendix 4 List of Special Register (SD) Areas
Description Details
Data memory (drive 4) usage Usage status of the data memory is stored using the
status following bit pattern. (ON indicates being used.)
b0: Event history
b1: Unused
b2: Label communication data
b3 to b15: Unused
Data memory (drive 4) The capacity of the data memory is stored in
capacity: the lower digits increments of 1K byte.
(unit: K bytes) (The amount of free space for a formatted memory card
is stored.)
Data memory (drive 4) The capacity of the data memory is stored in
capacity: the higher digits increments of 1K byte.
(unit: K bytes) (The amount of free space for a formatted memory card
is stored.)
Write (transfer) status display This register displays write (transfer) status to the data
(percent) memory in percentage. (0 to 100%). The initial value is
"0". Upon completion of writing, this register is set to
"100". It is set to "0" at the time when the write
command is issued.
Index of the number of write
operations up to now
*1
• This register indicates the index value for the number
of write operations to the data memory up to now
(stored as a 32-bit BIN value). However, the number
of write operations is not equal to the index value.
• When the index value exceeds 100000, an error is
generated. (The index value is continued to be
counted even when it exceeds 100000.) If the index
value exceeds 100000, the remote head module
must be replaced.
Set by (setting
timing)
S (Status change)
S (Initial)
S (Initial)
S (Writing)
S (Writing)