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T419S Indicator Service Manual 61

7.1 SMA Protocol

7.1.2 Standard Scale Response Message

<LF> Line feed Start of the response message.

<s> Scale Status ‘Z’ Center of Zero

‘O’ Over Capacity

‘U’ Under Capacity

‘E’ Zero Error

‘T’ Tare Error

<space> None of the above conditions.

<r> range Multi-interval range. Always ‘1’ if multi-interval is

disabled.

<n> gross/net status ‘G’ = Gross weight

‘T’ = Tare weight

‘N’ = Net weight

<m> Motion status ‘M’ = scale is in motion

<space> = scale is stable

<f> Future use <space> = always a space.

7.1.3 Unrecognized Command Response

7.1.4 About Command Response

The ‘A’ and ‘B’ commands are used together to get all of the scale about data. The ‘A’

command will always return the 1st response below. The ‘B’ command must be sent

multiple times to get the 2nd, 3rd, and 4th responses. Once the 4th response is

received, the next ‘B’ command will return an Unrecognized Command Response. At

this point you would have to send another ‘A’ command to get the 1st response again.

1st response: <xxx> = “SMA”

<yyyyy> = compliance level/revision

2nd response: <xxx> = “MFG”

<yyyyy> = manufacturer

3rd response: <xxx> = “MOD”

<yyyyy> = software part number

4th response: <xxx> = “REV”

<yyyyy> = software revision

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