Scanlab RTC6 PCIe Board Installation And Operation Manual page 608

Ctrl Command select_rtc
With the RTC4, select_rtc only activates the specified board (unconditionally).
RTC4RTC6
With the RTC6, select_rtc additionally delivers a return value and tries to get access to the
specified board granted (as with acquire_rtc) or remains ineffective.
RTC5RTC6 Unchanged functionality.
Version info Available as of DLL 600, OUT 600, RBF 600.
References –
RTC6 boards
Doc. Rev. 1.0.21 en-US
10 RTC6 Commands
608