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
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
DMM 4650 |
9pin
|
| Extension cord 1:1 |
|
| e.g. Modem connection |
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 A00: data
RESTORE G00: data
RESTORE s20: data RESTORE TA.1: RESTORE U: data
RESTORE is needed for data
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