mensor DPG 2400, Operating Instructions Manual

Page: 26 / 36

26 Operating Instructions DPG 2400 Series
Digital Pressure Gauge
DPG 2400 Series
7.2.1 Password Protection
Certain commands require a password to be sent before a setting is changed. The
password is only effective for the next command, so the password must be sent
immediately before any password protected command string. The password string is
the password set in the DPG 2400. The password is set at the factory to “0000”.
7.2.2 Response String Format
All strings sent by the DPG 2400 are terminated by a carriage return <cr> and linefeed
<lf>. The DPG 2400 will return an “R” character (ASCII 82) to indicate that it has
received a valid command or password rather than a query. If an invalid command or
password is sent, the “R” character will not be returned. When communicating with the
DPG 2400, the “R” character must be received before sending additional commands
or queries. In the event that an invalid command could be sent, a timeout period of
approximately one second should be used before sending the next command or query.
The full command word is shown in Table 7.2.5 “Command Set” in all capital letters.
Other conventions used to describe commands are shown in Table 7.2 “Command
Conventions”.
7.2.3 DPG 2400 Address
Each DPG 2400 is assigned address “1” at the factory. In a multiple unit system each
device must have a unique address. Valid addresses are 0 through 9 and A through Z
(upper and lower case are interpreted the same). The “A” command is used to change
the address.
7.2.4 Wildcard Address Operator (*)
In addition to the 36 unique addresses available, an asterisk (*) functions as a wildcard
address operator. However, the wildcard must not be used in queries if more than one
device is connected to the RS-485 port.