Mitsubishi Electric CR800 Series Instruction Manual page 191

17. Troubleshooting
This section explains causes of error occurrence and actions to be taken.
Occurrence of errors of Tracking and Vision Sensor
17.1.
Error
Error description
number
L2500 Tracking encoder
data error
L2510 Tracking parameter
reverses
L2520 Tracking parameter is
range over
L2530 There is no area
where data is written
L2540 There is no read data
Table 17-1 List of Tracking relation Errors
[Causes]
The data of the tracking encoder is abnormal.
(The amount of the change is 1.9 times or more.)
[Actions]
1) Check the conveyor rotates at the fixed velocity.
2)
Check the connection of the encoder.
3)
Check the earth of the earth wire.
[Causes]
Tracking parameter[EXCRGMN] and [EXCRGMX] Setting value
reverses
[Actions]
1) Check the value of [ENCRGMX] and [ENCRGMN] parameters.
[Causes]
The set value is outside the range parameter [TRBUF]. The first
argument is 1 to 8, and the second argument is 1 to 64.
[Actions]
1) Check the value of [TRBUF] parameter.
[Causes]
The data of the size or more of the buffer in which the TrWrt command
was continuously set to the second argument of parameter [TRBUF]
was written.
[Actions]
1) Check the execution count of the TrWrt command is correct.
2) Check the value of the second argument of parameter [TRBUF] is
correct.
3) Check that the X and Y coordinates of the position variable "PCHK"
in "CM1" program are not "0." If they are "0," change the difference
from the theoretical value to an allowable value.
[Causes]
The TrRd command was executed in state the data is not written in
tracking buffer.
[Actions]
1) Execute the TrRd command after confirming whether the buffer has
the data with the state variable [M_Trbfct].
2) Confirm whether the buffer number specified by the buffer number
specified in TrWrt command and the TrRd command is in
agreement.
Occurrence of errors of Tracking and Vision Sensor 17-179
Causes and actions
17 Troubleshooting