Operating Instructions

Warning Codes
Digital Keypad RT-KEYPAD
285 | 443
ID No.
Display on LCD Keypad
Warning Name
Description
50
PLC opposite defect (PLod)
PLC download error warning
Action and Reset
Action level
During PLC downloading, the program source code detects incorrect address (e.g. the address
exceeds the range), then the PLod warning occurs.
Action time
Immediately act when the fault is detected
Warning setting parameter
N/A
Reset method
Check if the program is correct and download the program again. If the fault does not exist, the
warning automatically clears.
Reset condition
N/A
Record
N/A
Cause
Corrective Actions
Incorrect data number is found when
downloading the PLC program
Use the correct data number.
ID No.
Display on LCD Keypad
Warning Name
Description
51
PLC save memory error
(PLSv)
Data error during PLC operation
Action and Reset
Action level
The program detects incorrect written address (e.g. the address exceeds the range) during PLC
operation, then the PLSv warning occurs.
Action time
Immediately act when the fault is detected
Warning setting parameter
N/A
Reset method
Check if the program is correct and download the program again. If the fault does not exist, the
warning automatically clears.
Reset condition
N/A
Record
N/A
Cause
Corrective Actions
An incorrect written address is detected
during PLC operation
Ensure the written address is correct and download the program again.