Operating Instructions

Warning Codes
Digital Keypad RT-KEYPAD
286 | 443
ID No.
Display on LCD Keypad
Warning Name
Description
52
Data defect
(PLdA)
Data error during PLC operation
Action and Reset
Action level
The program detects incorrect written address when translating the program source code (for
example, the address exceeds the range) during PLC downloading, then PLdA 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
During PLC operation, the external
Modbus has written/read incorrect data to
internal PLC program
Check if the upper unit transmits the correct command
ID No.
Display on LCD Keypad
Warning Name
Description
53
Function defect
(PLFn)
PLC download function code error
Action and Reset
Action level
The program detects incorrect command (unsupported command) during PLC downloading, then
PLFn 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
Unsupported command has used while
downloading the program
Check if the firmware of the drive is the old version. If yes, please contact Siemens.
ID No.
Display on LCD Keypad
Warning Name
Description
54
PLC buffer overflow (PLor)
PLC register overflow
Action and Reset
Action level
When PLC runs the last command and the command exceeds the maximum capacity of the
program, then PLor warning occurs.
Action time
Immediately act when the fault is detected