Mitsubishi Electric MELSEC Q Series, User Manual

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Chapter 14 Common Functions
Latest backup data
The latest backup data outputs the following data saved in the fixed cycle to the buffer
memory.
• Feed current value
• Servo command value
• Encoder single revolution position
• Encoder multiple revolution counter
• Time 1 (Year: month) data
• Time 2 (Day: hour) data
• Time 3 (Minute: second) data
• Latest backup data pointer
The latest backup data starts outputting the data after the power on.
After the home position is established in the absolute system, the data becomes valid
and outputs the current value.
The following servo amplifier and servo motor are connected artificially during amplifier-
less operation. Therefore, the encoder single revolution position and encoder multiple
revolution counter made virtually by the command value are output.
[CiA402 mode]
Servo amplifier type : MR-J4-10GF
Motor type
: HG-KR053 (Resolution per servo motor rotation: 4194304 PLS/rev)
Backup data at the power disconnection
The detail of the latest backup data right before the power disconnection is output to the
buffer memory.
The backup data at the power on starts being output after the power on.
The backup data at the power disconnection starts being output after the power on.
The detail of the latest backup data right before the power disconnection used in the
absolute system setting is output, regardless of the setting of the absolute system or
incremental system.
If the data has never been used in the absolute system in the incremental system setting,
"0" is output in all storage items.
Backup data at the power on
After the power on, the detail of the data which restored the current value is output to the
buffer memory.
The backup data at the power on starts being output after the power on.
If the current value cannot be restored in the absolute system, "0" is set to the feed
current value and servo command value.
The error "HPR data incorrect" (error code: 1201) is set in the error code at current value
restoration.
When the incremental system is set, the detail of the backup data at the power on used
in the absolute system setting is output. If the data has never been used in the absolute
system, "0" is output in all storage items.