Trigger Mode - Microscan MS-1 Integration Manual

Trigger Mode

Definition: The Trigger is the event that initiates a read cycle.
Serial Cmd: <K200,trigger
Default: Continuous Read
Options: 0 = Continuous Read
2 = External Level
3 = External Edge
4 = Serial Data
5 = Serial Data and Edge
Continuous Read
Usage: Continuous Read is useful in testing symbol readability or MS-1 functions. It
is not recommended for normal operations.
Definition: In Continuous Read, trigger input options are disabled and the MS-1 is
always in the read cycle. If a single symbol stays within read range for
multiple read cycles, its data will be transmitted repeatedly until it leaves
the read range.
The MS-1 sends replies to serial commands that require responses when
symbol data is transmitted.
Note: No Read options have no affect on Continuous Read.
Serial Cmd: <K200,0>
External Level
Usage: This mode is effective in an application where the speeds of the conveying
apparatus are variable and the time the MS-1 spends reading each object
is not predictable. It also allows the user to determine if a No Read has
occurred.
Definition: External Level allows the read cycle (active state) to begin when a trigger
(change of state) from an external sensing device is received. The read
cycle persists until the object moves out of the sensor range and the active
trigger state changes again.
Serial Cmd: <K200,2>
MS-1 Scan Engine Integration Manual
mode>
Initiate Read Cycle:
Object #1, moving in front of the
detector beam, causes a
change in the trigger state,
which initiates the read cycle.
End Read Cycle:
The same object, moving out of
the detector beam, causes
another change in the trigger
state, which ends the read cycle.
Read Cycle
6-7