JAI SP-20000M-PMCL User Manual

Contents

JAI SP-20000M-PMCL User Manual Manual pdf 42 page image

SP-20000M-PMCL / SP-20000C-PMCL- 40 -7. Operating modes7.1. Acquisition control (change the frame rate)7.1.1 Acquisition controlWith Trigger OFF (free-running mode), it is possible to specify a free-running frame rate (i.e.,no trigger needed) that is slower than the default rate.Modification of the frame rate is done by entering a value in the AcquisitionFrameRate controlcorresponding to the number of microseconds to be allocated to each frame period. Allowedvalues range from 1697Hz to 0.125Hz depending on the ROI and the tap geometry specified.However if the value entered is less than the time required for the default frame rate, thesetting is ignored and the default frame rate is used. For example, in 1X2 if the value enteredis less than the time required at 80MHz Camera Link pixel clock, the minimum frame period forthe smallest possible ROI (2 lines) requires 424Hz, so any entry less than 424Hz will always beignored in this configuration.The setting range in Acquisition Frame Rate is:Shortest to LongestInverse number of timerequired to drive all pixels inthe area set by ROI commandorinverse number of timerequired to transmit oneframe datato0.125 Hz = 8 secondsFor additional details, refer to table 23.Note: In the table 23, it is possible to set, for instance 7.8136 fps for 1X2–1Y, full frame and80 MHzMHz of Camera Link pixel clock, but 7.8136 fps is the setting limit value. This value willvary depending on shutter settings which will cause 1 H delay in conditions. 7.5 fps is theperformance guaranteed value.How to set:ROI should be set first.The available number shown in Acquisition Frame Rate will correspond to the maximum frameperiod for the specified ROI.The value can be decreased up to 0.125Hz (fps).If ROI is changed from a smaller size to a larger size, the default frame rate of the ROI isautomatically recalculated inside the camera and changed to the slower frame rate of the largerROI.ROI setting:Height: 2 lines to 3840 lines for SP-20000M-PMCL2 lines to 3840 lines for SP-20000C-PMCLAs for the details of ROI settings, refer to section 6.3.3.