| 摘要 |
PURPOSE:To reduce the number of parts of a panel logic circuit part and to hold the reliability and to reduce the mounting space, by executing a microprogram routine for maintenance or diagnosis in a control storage by an operation processing device. CONSTITUTION:Commands for maintenance or diagnosis from panel command and panel data switches 103 and 104 of a maintenance panel operation and display part 1 are received by panel command and data registers 204 and 205 of a panel logic circuit part 2, and contents of registers 204 and 205 are selected by a panel data selector 206 and are applied to an operation processing device 3. The output of a timing controlling circuit 203 for the panel logic circuit part is applied to a timing controlling circuit 303, and the output of a control storage address generating circuit 202 for maintenance and diagnosis is applied to a control storage address selector 302. A program routine for maintenance or diagnosis in the logic circuit part 2 is executed in the device 3, thus reducing the number of parts of the circuit part 2 to improve the reliability. |
