Deviation Counter Clear Function - Mitsubishi Electric MELSEC Q Series User Manual

11.7

Deviation Counter Clear Function

The "deviation counter clear function" clears the accumulated pulses in the deviation counter to 0.
When the servomotor power was turned off due to an emergency stop during positioning, clearing the accumulated
pulses in the deviation counter to 0 prevents servomotor rotation at power recovery.
(1) Precautions for control
(a) Start after clearing deviation counter
To start positioning after clearing the deviation counter, check the following two points.
• The value in "
• No error is occurring.
(b) " Actual current value" and "
Md.2
• When the deviation counter is cleared, "
"
Md.1
• To change "
value" of before clearing the deviation counter, follow the procedure below.
1
2
3
4
(2) Data setting and the execution condition of the function
The following table lists the data to be set and the condition to execute the deviation counter clear function.
Setting item
Deviation counter clear
Cd.4
command
220
Deviation counter clear command" changed to 0.
Cd.4
Current feed value".
Current feed value" of after clearing the deviation counter to "
Md.1
Read out the value in "
Md.2
Write the read value to "
Cd.1
Clear the deviation counter.
Change the current value.
Setting range
1: Clear the deviation
counter
Current feed value"
Md.1
Actual current value" changes to the value in
Md.2
Actual current value".
New current value".
Execution condition of
Default value
BUSY signal (X14) must be
0
off.
Actual current
Md.2
the deviation counter
clear function
Buffer memory
address
(decimal)
86