Bedienungsanleitung Weightec 348 (Seite 34 von 53) (Englisch)

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10. 2 EXPLANATION DATA STRING RECEIPT

The comport is full duplex: receipt and transmission may occur at the same time.

A new command for the same activity deletes the previous one if that one not yet had been executed.

It is advised to send some spaces (f.e. CR’s) in between strings that are sent direct after one another.

This may happen f.e. by sending several setpoint values for different (course - fine dosing) setpoints.

After sending a setpoint value, this value may be requested to be send in return, in order to check the correct

receipt of the command (echo). The same command as sent should be returned by the 348 with only a “#” in

digit 2 as difference. Code”#” means this is a transmission from a 348.

There are 2 different kind of strings that may be sent to a 348: :

10. 2. 1 QUESTION

Index: Always a ? in the 2

digit

The receipt of a question does not start any action of the 348, but creates an answer only.

In continuous sending mode (call nr. 0=A) a 348 sends continuously with the string “weight

data” the gross or the nett weight + standard data.

If in this mode a “setpoint” or “info” request is received, the required information is sent one

time only, thereafter the previous transmission is continued.

Available questions are:

X ? G What is the gross weight ?

X ? N What is the net weight ?

X ? T What is the tare weight ? (= gross -/- net)

X ? Z What is the zero value compensation ?

(= the weight selected at power on, subtracted from signal input to create an exact

zero, dead load switch settings excluded)

X ? S .. What is the weight value and status of setpoint nr. .. (A, B, D or H = 1, 2, 3, or 4)

X ? S @ What is the gross A/D converter output (in high resolution 1:2,000,000) ?

X ? H What is the 348’s internal temperature, and excitation voltage of the loadcells ?

10. 2. 2 COMMAND

Index: Always a ! in the 2

digit

A received command will cause immediate action of the 348.

If the required action is not possible to execute, the 348 will show a status report in digit

3, 4, 11 or 12 of the string “weight”, indicating why the action is not, or later will be executed.

Available commands are:

X ! G Set gross = cancel tare

X ! N Set nett = start tare operation to zero, after -waiting for- no motion of the

weight value *)

After the tare operation, a 348 in continuous sending mode (nr. 0) will

automatically switch over to transmit the nett weight in data string “weight”.

X ! Z Set zero, executable only within the -1.3%...+2.7% of scale capacity.

X ! S W--W. . Set the setpoint value (x10) W--W, and the executive code for setpoint nr. ..

X ! R .. .. Start of stop one or more setpoints nr(s) .. with filter code ..

X ! E Special commands and resets

*) Attention! The command X ! T does not exist. The tare command is : X ! N

Manual 348-2 V 3.1 Page 34 01-06-2007

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