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CHAPTER 11 CONTROL SUB FUNCTIONS
11
11.9 Accumulated Pulse Error Detection Function
11.9.1 Measuring and saving the reference value in the flash ROM
11.9.1 Measuring and saving the reference value in the flash ROM
Before using the accumulated pulse error detection function, the reference value needs to be measured to detect
errors.
Reference value means the maximum/minimum accumulated pulse values that are output when the QD73A1 is
operating normally.
The QD73A1 obtains the judgment value for alert output and immediate stop and carry out control using the reference
value, alert output accumulated pulse setting value, and immediate stop accumulated pulse setting value.
Executing procedure is as follows.
1. Set " Measurement start request" to "1: Requested" and start the reference value
measurement.
The QD73A1 monitors the status of accumulated pulses and measures the maximum/minimum values
while " Measurement start request" is set to 1.
2. Set " Reference value write request" to "1: Requested" when " Reference value
measurement flag" is set to "1: Measured".
The QD73A1 saves the measured maximum/minimum values in the flash ROM when " Reference
value write request" is set to 1.
Cd.19
Cd.19
Cd.20
Md.20
Cd.20
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Executed by the QD73A1
Measurement range
Positioning command
Accumulated pulse
Start signal (Y20 to Y26)
BUSY signal (X14)
Measurement start
request
Reference value
measurement flag
Reference value
write request
Cleared to 0 by the QD73A1
Maximum
value
Minimum value
v
t
Cd.19
Md.20
Cd.20