Library /sys$common/syshlp/ncphelp.hlb SET, CIRCUIT, COUNTER TIMER seconds  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Specifies the number of seconds that the circuit counter timer
 will run.   When the counter timer expires, a circuit counter
 logging event occurs.   Seconds must be a decimal integer in the
 range 0 to 65535.  If no value is set for COUNTER TIMER, the
 circuit counters are not logged automatically.