Meinberg FDM511 - Manual (Page 17)

17
Time Deviation Preset
A time deviation preset value in the range of -99.999 to +99.999 seconds can be set by a
serial ASCII command via the serial interface COM0. Sending the following string to the
FDM511 causes the module to set the time deviation and the PL time is recalculated
according to this new value. All previously accumulated time deviation is lost.
The ASCII command to set the preset value starts with the characters "F27PS" and
ends with the Carriage-Return (ASCII code 0Dh) and Line-Feed (ASCII code 0Ah).
The numbers displayed in italics are replaced by the time deviation preset value whereas
the other characters are part of the string. Examples:
send Preset Value +10.553:
F27PS+10.553
(string sent to FDM511)
OK (response from FDM511)
send Preset Value -08.68:
F27PS-08.68
(string sent to FDM511)
OK (response from FDM511)
read out the Preset Value:
F27PS
(string sent to FDM511)
F27PS=-08.680 (response from FDM511)
The preset value must be entered with the sign (+ or -), two digits as integer (01 to 99),
a dot as separatror (.) and two or three following decimal places. FDM511 returns the
OK acknowledge and recalculates the corresponding PL time. This causes the "Fail"-
LED to be switched on for a short time before normal operation is started again.
Note: The described time deviation preset method is available via COM0, only, and not
with COM1! Furthermore, the output string AREVA has to be choosen for COM0.