Fairbanks X SERIES PR 5410 Process Indicator User Manual

Page 119

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Section 5: SMA Protocol

10/08 119

51207 Revision 1

5.3 SMA Command Set

The SMA command set is intended for requesting weight values and status information as well as
for control of the scale. The commands start with <LF> and end with <CR>.
Format: <LF>c<CR>

5.3.1 Requesting a Weight

Requesting a Weight
Command: <LF>W<CR>
Reply:

The scale immediately returns the weight and status: gross weight if not tared, net
weight if tared.

For details, see Chapter 5.4.1 .

Requesting the Weight with Stability

Command: <LF>P<CR>
Reply:

The scale returns the weight and the status only, when the stability condition is met:
Gross weight if not tared, net weight if tared.

For this function, the stability condition must be met. The maximum waiting time for
stability is set under [Tare timeout]; see Chapter 4.5.13.

After elapse of the waiting time without reaching stability, the following reply is sent:

For details, see Chapter 5.4.1 .

Requesting Weight Continuously

This is a command which generates non-requested replies, because it does not function according
to the strict pattern of command and reply. After the command, the scale repeats the reply
continuously.

Command: <LF>R<CR>
Reply:

The scale repeats the weight and status information continuously until another
command is received.

For details, see Chapter 5.4.1 .

Dependent on the used baud rate, the repetition rate of reply telegrams is roughly as follows:
19200 bd

100ms

9600 bd

110ms

4800 bd

170ms

Requesting the High-Resolution Weight

Command <LF>H<CR>
Reply:

The scale immediately returns the high-resolution (10x) weight and status: Gross weight
if not tared, net weight if tared.

Note: The <n> gross/net status is shown in lower-case letters while the high-resolution
weight is sent.

For details, see Chapter 5.4.1 .

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