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Mitsubishi Electric MELSEC Q Series User Manual page 212

Positioning module
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(2) Precautions for control
• Execute OPR without fail after resetting the CPU module. If not, a positioning error occurs by the fractions of
electronic gear that were not output during positioning before the CPU reset.
• When the positioning speed value that was multiplied by the set value of electronic gear exceeds the speed
limit value, the limit value is ignored. On the other hand, if the speed exceeds 4Mpulse/s, the maximum
value of command frequency, the error "Outside the command frequency range" (error code: 104) occurs. In
this case, the speed is 4Mpulse/s, resulting in a positioning error. To avoid this case, satisfy the following
condition when setting positioning speed and electronic gear: Positioning speed × Electronic gear 
4Mpulse/s
(3) Setting the electronic gear function
The following table lists the data to be set, setting condition, and check timing.
Setting item
Numerator of
command pulse
Pr.3
multiplication for
electronic gear (CMX)
Denominator of
command pulse
Pr.4
multiplication for
electronic gear (CDV)
210
Setting
Default value
range
1
1 to 9999
1
Setting
Check timing of
condition
the set data
PLC READY
When PLC READY
signal (Y2D)
signal (Y2D) is turned
must be off.
on
Buffer
memory
address
(decimal)
4
5

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