| 摘要 |
PURPOSE:To prevent abnormal stoppage by providing an address detecting means, a delimiter detecting means and a logical product means, and sending a data transfer signal when the output of the logical product means becomes '1'. CONSTITUTION:The address detecting means 20 detects that the addresses of prescribed apparatuses 11 to 1n to be controlled were designated according to a signal on a bus. When an address signal set in the detecting means 20 is detected on a general purpose instrument bus GPIB, the signal is sent to the logical product means 50. On the other hand, when the delimiter detecting means 30 in which the codes of designated delimiters (OA, OD) are set detects data (OA, OD) on GPIB, it sends the signal to the logical product means 50. The abnormal stoppage, i.e., the system-down of instrument system can be prevented by sending '1', i.e., an EOI signal onto GPIB by the logical product means 50 when both the signals become '1'. |
