LMI Gocator 2000 Family, User Manual

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Serial Protocol • 158 Gocator 2000 Family
Message Format
Measurement information is transmitted in a series of ASCII frames each terminated by a special
delimiter (CR – 0x0D).
For each measurement message the following frame is transmitted:
M t
n
, i
n
, V v
n
, D d
1
CR
Field Shorthand Length Description
MeasurementStart M 1 Start of measurement frame
Type t
n
n Hexadecimal value that identifies the type of measurement:
0x00 – Width (μm)
0x01 – Height (μm)
0x02 – Distance (μm)
0x03 – Center X (μm)
0x04 – Center Z (μm)
0x05 – Position X (μm)
0x06 – Position Z (μm)
0x10 – Intersect X (μm)
0x11 – Intersect Z (μm)
0x12 – Intersect Angle (millidegrees)
0x13 – Angle X (millidegrees)
0x20 – Intersect Area (0.001 mm
2
)
0x21 – Box Area (0.001 mm
2
)
0x30 – Script (script-specific)
Id i
n
n Hexadecimal value that represents the unique identifier of the
measurement.
ValueStart V 1 Start of measurement value. This field and the following Value field
are optional – they will only be present if the measurement value
has been selected for transmission.
Value v
n
n Measurement value, in hexadecimal. The unit of the value is
measurement-specific.
DecisionStart D 1 Start of measurement decision. This field and the following Decision
field are optional – they will only be present if the measurement
decision has been selected for transmission.
Decision d
1
1 Measurement decision:
0 – Pass
1 – Fail
EndFrame CR 1 Carriage return (0xD), marking end of frame.
Additional message types may be added in future releases. Each message type will begin with a unique letter.
For future compatibility, software written to receive serial messages should ignore any messages not beginning
with a recognized letter up to the trailing end of frame character (CR).