Panasonic FP7 Series Command Reference Manual page 937

Code Execution result
Processing interval setting
H15
error
H20 Response timeout error
H30 Ethernet task response timeout It occurs when no response is returned from the Ethernet task.
(Note 1) The instruction with the number of processing times set to 0 to cancel the time adjustment request
instruction does not cause a double startup error.
(Note 2) This error also occurs if the NTP IP address is unresolved.
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Example of processing
Example 1) Time adjustment request → Time is being adjusted. → Time adjustment
retrieval is normally ended.
[S1]...U1 [S2]...U16 [D]...DT10
When instruction is executed
Example 2) When a response timeout has occurred in the time adjustment
[S1]...U3 [S2]...U16 [D]...DT10
When instruction is executed
Timeout occurs after 41 seconds: S1x3 + (S2x(S1-1)). (Total processing time before timeout is
3 seconds multiplied by 3. Total processing interval is 16 seconds multiplied by (3-1).)
Example 3) When the time adjustment request ends abnormally (Ethernet
initialization in progress error)
[S1]...U2 [S2]...U16 [D]...DT10
When instruction is executed
WUME-FP7CPUPGR-12
17.10 pNTPcREQ (Time Adjustment Request Instruction)
The specified processing interval is out of the range.
The time adjustment response exceeds the specified time
2)
Time is being adjusted.
Time is being adjusted.
Time adjustment is completed.
Time adjustment is completed.
(Note
17-49