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Remote, RS 232 interface, data backup
General
Data backup should be performed prior to new installations and programming modifications of the DMM
4650. This ensures that replacing an appliance for service purposes takes the least effort, immediately
providing identical functions on the replacement unit. When setting-up systems with similar functions more
often, the programming data can be copied using a ready-made data carrier.
For data backup a PC with serial interface and a terminal program is necessary. Please note that the
guidelines of the manufacturer of data media (disks, tapes etc.) are to be observed for maximum data
safety, since they guarantee data integrity for a limited period of time only.
Using a medium transfer baud rate, the backup of a device status including its gong, alarm, sequences
and trigger (“backup”) presets lasts about 10 seconds. If the audio data of the message memory(“backup
message”) is supposed to be saved additionally, the duration depends on the length of the recorded
messages and can last several minutes (short message) up to some hours (memory completely used).
Thus, it is recommended to perform an audio data backup via the menu “message edit Play all” onto a
DAT recorder or tape deck.
Connection REMOTE/RS 232
Interface settings
Baud rate 300 to 38400 The baud rate can be set at the DMM 4650 (“System setup > RS232"),
Data bits 8 as well as via the interface with command (see list REMOTE commands).
Parity none After pressing the Return key on the PC (Line Feed), the unit returns
Stop bit 1 “DMM 4650" (communication test).
Protocol Xon/Xoff The baud rate is factory preset to 9600 baud.
Backup, Restore commands, Priority
The “backup” command can be given both, from the DMM 4650 menu “System setup > backup”, as well
as via the REMOTE interface. After starting the backup procedure, the desired data is transmitted in the
previously determined format via the REMOTE interface. The PC’s terminal program receives the data
and creates a corresponding file. The terminal program’s configuration is not to be set for any conversion
of the received data.
Part of backup file: RESTORE is needed for data re-storing, A00 = alarm preset 00, G=gong,
S=sequences, s=stop trigger, TA.1 =trigger PortA Input1, M=message and
U=basic settings. This text file can be altered using an editor, e.g. by altering
A00 into A05 or deleting whole presets including all data belonging to them.
:Data consist of the character string which belongs to the preset and which
may not be altered. (! word processor software like WORD or Word Pad
should not be used to perform the described alterations, since they add they
own format strings to the text.)
9pin D-SUB connector (male)
Extension cord 1:1
e.g. Modem connection
DMM 4650
RESTORE A00: data
RESTORE G00: data
RESTORE s20: data
RESTORE TA.1:
RESTORE U: data
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