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Since the meter does not handle a great deal of data, the link has been optimized to allow
the user, through very simple instructions, to control and interrogate the meter. The
following section describes the JPC Protocol used by the meter. NOTE: RS232 is only
available on DPM-1200 and DPM-1300 models.
The JPC Protocol consists of 6 basic commands:
The data format is standard ASCII and all data are BCD values.
The following is a breakdown of each of the commands and the way they are accessed.
The meter will echo all characters that are typed to it. When used with a terminal, this will
provide the appropriate display. When used with a computer system, this will provide direct
feedback of the fact that meter has accepted the data.
All commands are completed with a carriage return from the computer. All commands will
be acknowledged by a carriage return, line feed ($0D,$0A). If a command is not valid, the
meter will respond with "??". All commands are not case sensitive.
COMMUNICATIONS
R
- READ
W - WRITE
U
- UPLOAD
Q
- QUICKSEND
V
- VERSION
X
- CANCEL
17
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