PCE Instruments TDS-100H, Руководство пользователя

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TDS-100H Handhold Ultrasonic Flowmeter Ver.8.08 - 29 -
6. Communication Protocol
§6. 0 General
The TDS-100 series ultrasonic flow meter integrates a standard RS-232C communication interface
and a complete set of communication protocols that are compatible with that of the Fuji’s ultrasonic
flow meter.
§6.1 Interface Pin-out Definition
Pin 1 for battery recharge, positive input
2 RXD
3 TXD
4 not used
5 GND
6 OCT
output
7 not used
8 for battery recharge, negative input
9 RING input for connecting a MODEM
§6.2 the Protocol
The protocol is comprised of a set of basic commands that is a string in ASCII format, ending with
a carriage (CR) and line feed (LF). Commonly used commands are listed in the following table.
Command Function
Data Format
DQD(CR) Return flow rate per day
±
d.ddddddE
±
dd(CR)
（
LF
）
*
DQH(CR) Return flow rate per hour
±
d.ddddddE
±
dd(CR)
（
LF
）
DQM(CR) Return flow rate per minute
±
d.ddddddE
±
dd(CR) （ LF ）
DQS(CR) Return flow rate per second
±
d.ddddddE
±
dd(CR) （ LF ）
DV(CR) Return flow velocity
±
d.ddddddE
±
dd(CR)
（
LF
）
DI+(CR) Return POS totalizer
±
dddddddE
±
d(CR)
（
LF
）
**
DI-(CR) Return NEG totalizer
±
dddddddE
±
d(CR) （ LF ）
DIN(CR) Return NET totalizer
±
dddddddE
±
d(CR) （ LF ）
DID(CR) Return Identification Number ddddd(CR)
（
LF
）
DL(CR) Return signal strength and quality S=ddd,ddd Q=dd (CR)(LF)
DT(CR) Return date and time yy-mm-dd hh:mm:ss(CR)(LF)
M@(CR)*** Send a key value as if a key is pressed
LCD(CR) Return the current window display