Mitsubishi Electric 800 Series Instruction Manual page 231

Position control under vector control
Cumulative pulse monitor
• When the Vector control compatible plug-in option or the control terminal option (FR-A8TP) is used, the accumulated value
of the encoder pulses can be monitored.
• The cumulative pulse monitor is available when "71 to 74" is set in the monitor selection parameters (Pr.52, Pr.774, Pr.775,
Pr.776, and Pr.992).
Types of Monitor
Cumulative pulse
Cumulative pulse overflow times
Cumulative pulse (control
terminal option)
Cumulative pulse carrying
overflow times (control terminal
option)

Negative values are not displayed on the operation panel. The values "-1 to -32767" are displayed as "65535 to 32769" on the operation panel.
Cumulative pulse division scaling factor (Pr.636, Pr.637)
• Set the division scaling factor on the cumulative pulse in Pr.636 or Pr.637.
• Cumulative pulse count value calculation method
Cumulative pulse count value = Cumulative pulse division scaling factor  (Cumulative pulse overflow times  32768 +
Cumulative pulse monitor value)
Cumulative pulse count value: Number of pulses multiplied by 4
Cumulative pulse division scaling factor: Pr.636 or Pr.637
230
PARAMETERS
Pr.52, Pr.774 to Display with
Pr.776, Pr.992 minus sign
71 

72 

73 

74 

Description
The cumulative number of pulses is displayed (for Vector
control compatible plug-in option).
(Monitoring range: -32767 to 32767)
The number of the cumulative pulses carrying overflow
times is displayed (for Vector control compatible plug-in
option).
The cumulative number of pulses is displayed (for the FR-
A8TP).
(Monitoring range: -32767 to 32767)
The number of the cumulative pulse overflow times is
displayed (for FR-A8TP).