Delta AS Series Programming Manual page 995

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 The DMVSH instruction is enabled.
 Set Start1 to On to notify the instruction to send the output signal Shoot1 (which is on for about 10ms) and notify DMV
to enable the detection function of the first camera.
 After DMV receives the trigger message, Ready is set from On to Off.
 Shoot1 is cleared to Off automatically by the PLC.
 Set Start2 to On to notify the instruction to send the output signal Shoot2 (which is on for about 10ms) and notify DMV
to enable the detection function of the second camera.
 Shoot2 is cleared to Off automatically by the PLC.
 After DMV detection is finished, Ready is set from Off to On and the two detections are complete. Then the PLC sends
a read command via Modbus 0x03.
 The Ok flag is set to On after the PLC receives the communication data sent back from DMV. At the moment, the already
received data can be processed.
 The Start1, Start2 and Ok flags can be cleared to Off by manual. If the detection need be retriggered to execute, return
to step 2 to proceed.
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